Revert "M2: board: add restart function in machine description"

This reverts commit 652a8856f78591e135e939fec71b80d9ac304289.
M2: fwd-port our old bcmdhd drivers and fixup board files to make them work.

Conflicts:
	arch/arm/mach-msm/Makefile
	arch/arm/mach-msm/board-8960.h
	drivers/net/wireless/bcmdhd/include/bcmspibrcm.h