msm: camera: icp: Handling deadlock on WD interrupt

This change fixes the potential deadlock scenario when acquire is in
progress and WD interrupt is triggered.
Since WD interrupt and fatal message are handled in same work queue, the
recovery code is serialized by itself.
Mutex lock is not required if we leave disabling timers in release
routine.

Change-Id: I0dfe469aa74c4c3e58eff03900c09a5221b8dcd1
Signed-off-by: Alok Pandey <akumarpa@codeaurora.org>