video: msm: Fix initial state of LCD backlight

* For devices which use the LCD backlight we need to actually call the
* function which sets the brightness after initializing it in the probe.

Change-Id: Id6b7c0de3cd31181394c56c7f6061bca9defd861
video: import panels from htc official kernel source

Change-Id: Ia2339497b9fa263822921529d905ac699f2d2592