msm: camera: icp: Add Power Collapse

Add support for ICP power collapse and IPE/BPS interframe
power collapse.

By default, interframe power collapse is enabled. If it needs to
be disabled, below command can be used. It must be done before
start of any use case.

adb shell "echo 0 > /sys/kernel/debug/camera_icp/icp_pc"

Change-Id: Idceec7b1b386cb894e7e074c4627d7b4dbcaf00a
Signed-off-by: Suresh Vankadara <svankada@codeaurora.org>
Signed-off-by: Alok Pandey <akumarpa@codeaurora.org>