ARM: dts: msm: Add LED flash support for 8916 Camera.

Dtsi changes for I2C based DUAL LED flash for 8916 camera.
This flash is available on MTP and also IMX135
on IKKI sensor board.

Change-Id: I5f5137a55bfb69933c3cc4e3baf3858a513f439e
Signed-off-by: Shankar Ravi <rshankar@codeaurora.org>