[PORT FROM R2] mt9m114: remove compiler warnings

[PORT FROM R2] mt9m114: remove compiler warnings

BZ: 17272

This patch removes compiler warnings from teh mt9m114 code.

Change-Id: Iba54e92b3441720749a70fd3f6f9d871bf509875
Orig-Change-Id: I3a735ea1b4001a32465fcd1cc13f6feb4493443e
Signed-off-by: Jozef Kruger <jozef.kruger@intel.com>
Reviewed-on: http://android.intel.com:8080/25631
Reviewed-by: Wang, Wen W <wen.w.wang@intel.com>
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: Cohen, David A <david.a.cohen@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
Reviewed-on: http://android.intel.com:8080/28036
Reviewed-by: Tuominen, TeemuX <teemux.tuominen@intel.com>