msm: camera: v4l2 updates

- Adds some protection against unexpected calls
- Update ifdef guards in msm_camera.h

Change-Id: I388822001159188a6c487f8c0deefa8fb5238249
Signed-off-by: Philippe Gravel <pgravel@codeaurora.org>
Signed-off-by: Sunil Joseph <sunilj@codeaurora.org>
3 files changed