FreeBSD/src d80c12bsys/dev/ixgbe ixgbe_mbx.c ixgbe_vf.c

Revert "ixgbe: introduce new mailbox API"

This is missing the ixgbe_mbx.h changes, revert so it can be
committed atomically.

This reverts commit 68ba3eabd4869577bf11c03a6ec6f472502be07d.
DeltaFile
+237-622sys/dev/ixgbe/ixgbe_mbx.c
+18-24sys/dev/ixgbe/ixgbe_vf.c
+29-3sys/dev/ixgbe/ixgbe_type.h
+2-5sys/dev/ixgbe/if_ix.c
+1-3sys/dev/ixgbe/ixgbe_82599.c
+1-3sys/dev/ixgbe/ixgbe_x540.c
+288-6606 files

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