msm: camera: icp: Reset timers if context is busy

If the ICP context has pending submissions, don't power off the clock
and remove the bandwidth votes just yet. Instead, reset the idle
timers so we can try again later.

Change-Id: I0d77411b70c854c15efd32742ba936135a1b780f
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>