arm/dt: msm8226: Add support for wled backlight

Add support for backlight for 8226 to operate with
one string of LEDs on CDP, MTP and QRD platforms.

Change-Id: I3800850b820fad117c0f5774d661615548ec2404
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
4 files changed