LCD_KCAL: Color Control driver for Nexus 5

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

Conflicts:
	drivers/video/msm/mdss/mdss_mdp_pp.c

Change-Id: I99f4c659542c42357ed672f39acb9f6d0f0a07f3
Add CONFIG_LCD_KCAL into defconfig

Change-Id: I29b0e6b3a78d6147c58652d3c1f5b7d6d663ce10