msm: camera: Fix for camera crash

1. update get_sensor_info function to send sensor type
   to the upper layers
2. update table ack pending flag in case of table ack
   received
3. add ov5647 sensor power down function

Change-Id: I92c8e25d377d2fee09276b72119eb95adfcc79f8
Signed-off-by: Raju P.L.S.S.S.N <rplsssn@codeaurora.org>