Voltage Control: initial voltage control for MSM S4-Pro SOC

Signed-off-by: faux123 <reioux@gmail.com>

Change-Id: If1893429a3a25e5f2e3b02ba1bd0b9d3c60dc682
Signed-off-by: Grarak <williye97@gmail.com>

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