msm: vidc: Add support for buffer tags and sub-frame info

   1) Clients send input_tag and output_tag through buffer
      reserved fields. Driver needs to pass them to FW and
      when FW returns them back, send them to client.
   2) Convey sub-frame information to client from FW.

Change-Id: Ia92bca933d18a7795ba17eea9178a4c5de49157b
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>
Signed-off-by: Umesh Pandey <umeshp@codeaurora.org>
Signed-off-by: Praveen Chavan <pchavan@codeaurora.org>