msm: vidc: Add DIVX311 support

Implement changes in the driver to support decoding of Divx311
bitstreams

Change-Id: Ie4e05c9161d89b866f9f36ca1865a9b64bc51240
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
[davidb: only videodev2.h part of patch]
Signed-off-by: David Brown <davidb@codeaurora.org>