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>
LCD Gamma Hack: sync with CM10.2 merged updates

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