Voltage Control: initial voltage control for MSM Snapdragon 800 SOC

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

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

Change-Id: I767451a68aa258ad97ba24df0ec841d5d726bb60
Voltage Control: add sysfs interface

Signed-off-by: faux123 <reioux@gmail.com>
Enable CPU voltage in cyanogen_hammerhead_defconfig

Change-Id: I69159f0a7202682191588ede2ed29168cd7132bb