LCD_KCAL: Color Control driver for Nexus 5

Change-Id: I22f63de82443d54dd3282aaa68cf16efdca924cd
msm: mdss: Reset panel to apply RGB gamma data

Writing to the reset gpios produces a short flicker. This however
appears to be the only reliable method to apply RGB gamma data
without switching the panel off and on again.

Change-Id: I80e0ef0ce968353a746a354399f16ed0a4d398f2
Enable color control