msm-camera: Enable Immediate VFE STOP.

Enable Immediate VFE STOP EVENT.

Signed-off-by: Katta Santhisindhu <kattas@codeaurora.org>
(cherry picked from commit 6c00ec788345b14380aed7fa5b29ff2d530d4fdb)

Change-Id: I500b65c83effb15a38bde3c608931ad13f82659c
Signed-off-by: Gopal Goberu <ggober@codeaurora.org>