msm: camera: icp: Add context based timer

Add timer expiry per context to reset clock, bandwidth.
When a context is inactive, remove the clocks and
bandwidth values associated with that context to
save power.

Change-Id: I82266a548f442e6690e6e7af52305668329635c5
Signed-off-by: Suresh Vankadara <svankada@codeaurora.org>
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>