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clk: Move allwinner driver into the common directory

No need to keep it under sys/arm/allwinner/clkng
It's easier to find which controller we support by looking under one directory.
It will also be shared with Allwinner RiscV SoC.

Sponsored by:   Beckhoff Automation GmbH & Co. KG
Differential Revision:  https://reviews.freebsd.org/D43188

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by:           Netflix

sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Similar commit in current:
(cherry picked from commit 685dc743dc3b)

sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Similar commit in current:
(cherry picked from commit 95ee2897e98f)

sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with:         pfg
MFC After:              3 days
Sponsored by:           Netflix

(cherry picked from commit 4d846d260e2b9a3d4d0a701462568268cbfe7a5b)

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with:         pfg
MFC After:              3 days
Sponsored by:           Netflix

arm allwinner: Remove unused devclass arguments to DRIVER_MODULE.

arm: clean up empty lines in .c and .h files

MFC r350842, r350844-r350846, r351099, r352848, r352859

r350842:
allwinner: Rework the BUS_PASS on drivers

- Put all clock and control unit driver in BUS_PASS_RESOURCE except
  for the DE2 CCU as it needs the main CCU to be available.
- Use BUS_PASS_CPU for a20_cpu_cfg as it makes more sense.
- For aw_syscon use SCHEDULER pass as we need it early for drivers
  that attach in BUS_PASS_SUPPORTDEV
- For the rest we can use BUS_PASS_SUPPORTDEV

r350844:
allwinner: Add a new clock aw_clk_m

We used the aw_clk_nm clock for clock with only one divider factor
and used a fake multiplier factor. This cannot work properly as we
end up writing the "fake" factor to the register (and so always set
the LSB to 1).

    [43 lines not shown]

allwinner: Add support to min/max in aw_clk_frac

The Fractionals clock in Allwinner device have some min/max frequencies
that they can do.
Add support for it.

allwinner: Rework the BUS_PASS on drivers

- Put all clock and control unit driver in BUS_PASS_RESOURCE except
  for the DE2 CCU as it needs the main CCU to be available.
- Use BUS_PASS_CPU for a20_cpu_cfg as it makes more sense.
- For aw_syscon use SCHEDULER pass as we need it early for drivers
  that attach in BUS_PASS_SUPPORTDEV
- For the rest we can use BUS_PASS_SUPPORTDEV

MFC r348179-r348182

r348179:
allwinner: aw_ccu: Add some debug printfs (disabled by default)

Also print information about setting frequency at boot under bootverbose

r348180:
arm: allwinner: clk: Add new clock aw_clk_frac

Add a clock driver for clock that can either be used in integer mode
with one N factor and one M divider or in fractional mode where the
output frequency is chosen between two predifined output.

r348181:
arm: allwinner: clk: Use the new frac clock

Some clocks used the NM type but this clock is for the ones with the
formula "clk = clkin / n / m" and not "clk = clkin * n / m"

    [6 lines not shown]

MFC r346092, r346271-r346272

r346092:
Import DTS files from Linux 5.0

r346271:
aw_rtc: Register the clocks

Since latest DTS update the rtc is supposed to register two clocks :

- osc32k (the 32k oscillator on the board that the RTC uses directly and
that other peripheral can use)
- iosc (the internal oscillator of the RTC when available which frequency
depend on the SoC revision)

Since we need the RTC before the proper clock control unit (because it uses
those clocks) attach it a BUS_PASS_BUS + MIDDLE and attach the clock control
unit at BUS_PASS_BUS + LAST for the SoC that requires it.


    [10 lines not shown]

MFHead @348740

Sponsored by:   The FreeBSD Foundation

arm: allwinner: clk: Use the new frac clock

Some clocks used the NM type but this clock is for the ones with the
formula "clk = clkin / n / m" and not "clk = clkin * n / m"
Use the new frac clock for them.

MFHead @347527

Sponsored by:   The FreeBSD Foundation

aw_rtc: Register the clocks

Since latest DTS update the rtc is supposed to register two clocks :

- osc32k (the 32k oscillator on the board that the RTC uses directly and
that other peripheral can use)
- iosc (the internal oscillator of the RTC when available which frequency
depend on the SoC revision)

Since we need the RTC before the proper clock control unit (because it uses
those clocks) attach it a BUS_PASS_BUS + MIDDLE and attach the clock control
unit at BUS_PASS_BUS + LAST for the SoC that requires it.

Tested On:           A20, H3, A64

MFC after:      1 month

allwinner: ccung: Fully subclass the clock drivers

Each clock drivers if now fully subclassed, this have the advantage that
we can control the probe order.
Some clocks can have parents from other drivers, for example clocks in the
sun8i_r driver uses clocks from the main clock driver.
This worked before because the sun8i_r node is after the main ccu node in the
dtb and driver are probed in DTB order. This cannot work with the Display
Engine clocks as it is the first node in the DTB.

Tested on:    A83T, H5 A64
Tested on:    A20 (kevans)

Merge ^/head r323559 through r325504.

MFhead at r324482

Allwinner A31 ccu: Use clock/reset IDs from dt-bindings

Do not redefines resets and clocks ID which are already in the
dt-bindings include directory. Those files are under dual licenced
under GPL2/MIT so use them directly.

Merge ^/head r314270 through r314419.

allwinner: A31: Add ccung driver

This adds clocks support for the aw_ccung on the A31 SoC.
Newer DTS files require this.
All the clocks except two CSI are defined and exported on the clock domain.