LCD_KCAL: Color Control driver for M8

RGB Defaults are 255/255/255
Write values to sysfs /sys/devices/platform/kcal_ctrl.0/

echo "255 255 255" > /sys/devices/platform/kcal_ctrl.0/kcal
echo "1" > /sys/devices/platform/kcal_ctrl.0/kcal_ctrl

Change-Id: Ib351677b6583ffc6b34d212bc9924dc24427eabd

Conflicts:

	arch/arm/mach-msm/Makefile
	arch/arm/mach-msm/board-htc-8974.c
	drivers/video/msm/mdss/Kconfig
	drivers/video/msm/mdss/mdss_mdp_pp.c
m8: enable LCD KCAL sysfs support

Change-Id: I873eab08a57783972add30782160ebfa34f510ee