Voltage Control: initial voltage control for MSM Snapdragon 800 SOC

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: flar2 <asegaert@gmail.com>

Conflicts:
	arch/arm/mach-msm/Kconfig
	arch/arm/mach-msm/acpuclock-krait.c

Change-Id: Ia6b63eab4afb5c9f007c9b2dee0dca6b0ffc3f60
Update defconfig with Voltage Control

Change-Id: I3f34716c4e2f92445a19dda1cfc5f0a89433f860