CPU OVERCLOCKING: initial CPU Overclocking for Snapdragon 800 Socs

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/acpuclock-8974.c
acpuclock-8974.c: fix derpy #ifdef
acpuclock-8974.c: OC up to 3GHz test
config: OC enabled