msm: camera: Add IR-LED and IR-cut filter driver

Add driver for PWM based IR-LED and IR-CUT filter
in camera to be used to capture very low light scenario.
It takes IR mode and IRLED Intensity from UMD configures
IRLED and IR CUT filter accordingly.

Change-Id: I97328b14c177a05f9f48a37d3198193e2204acd8
Signed-off-by: Om Parkash <oparkash@codeaurora.org>