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

This reverts commit 63265950553966d1d0d5f0a7ba604498f1cec8f2.
Revert "Revert "Voltage Control: add sysfs interface""

This reverts commit 63e261d133d440a020edc65c5ab078bea345e6f6.
ADD: 8064 Overclock