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

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

Conflicts:
	arch/arm/mach-msm/Kconfig
Voltage Control: add sysfs interface

Signed-off-by: faux123 <reioux@gmail.com>
Voltage Control: allow for lower minimums

this allows the low CPU frequencies to take advantage of UV control

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

Conflicts:
	arch/arm/mach-msm/lge/mako/board-mako-regulator.c