LGE KCAL control: intial adaptation from LGE G2 kernel for 8974Pro

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

Conflicts:
	arch/arm/mach-msm/Makefile
	arch/arm/mach-msm/board-8974.c
	drivers/video/msm/mdss/Kconfig

Change-Id: I10af403ce4196eb73c08894e37891a7305e5775f