Revert "Voltage Control: add sysfs interface"

This reverts commit 817b5f00907c2b150baf5adc8f7743789b31eeb4.
Revert "Voltage Control: initial voltage control for MSM S4-Pro SOC"

This reverts commit 7296be2e883e556ebd932957281923a932bcdf33.
Userspace Voltage Control (thanks faux123)

-Changed CONFIG name to my liking
-Fixed spelling in the Kconfig