PC-BSD/trueos 7b1468fsbin/nvmecontrol ns.c identify.c

Usage cleanup pt 1

Provide a usage() function that takes a struct nvme_function pointer
and produces a usage mssage. Eliminate all now-redundant usage
functions. Propigate the new argument through the program as needed.
Use common routine to print usage.

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D18403
DeltaFile
+24-56sbin/nvmecontrol/ns.c
+13-21sbin/nvmecontrol/identify.c
+7-16sbin/nvmecontrol/firmware.c
+8-15sbin/nvmecontrol/perftest.c
+6-14sbin/nvmecontrol/power.c
+17-2sbin/nvmecontrol/nvmecontrol.c
+5-13sbin/nvmecontrol/wdc.c
+4-12sbin/nvmecontrol/logpage.c
+4-12sbin/nvmecontrol/format.c
+3-11sbin/nvmecontrol/reset.c
+2-10sbin/nvmecontrol/devlist.c
+3-1sbin/nvmecontrol/nvmecontrol.h
+96-18312 files

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