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>
gamma control: WIP expose gamma parameters to sysfs interface

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

Conflicts:

	drivers/video/msm/mipi_lgit.c
gamma control: fix wip code derps :p

Signed-off-by: faux123 <reioux@gmail.com>
gamma control: add checksum to validate data integrity

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

Conflicts:

	drivers/video/msm/mipi_lgit.c
gamma control: fix typo derp :(

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