Userspace Voltage Control (thanks faux123)

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

Conflicts:
	arch/arm/mach-msm/Kconfig
Userspace Voltage Control: tweak faux123's original work

Only get/set frequencies that are configured to be used as scaling
frequencies.

Originally committed by _motley (https://github.com/thracemerin/kernel-Nexus4/commit/116b76f36c61adbac4db8c331e23b967c38389b6)
Allow UV to 600mV, adjust regulators appropriately.
defconfig: Enable Userspace Voltage Control