msm: vidc: Add support for marker pass through in input buffer

- App would mark a buffer with a flag in input buffer and
  this needs to be propogated by firmware in the output buffer
- Add support to handle this feature

Change-Id: Iea810096c405ce4cdaa63ae6768eb7f5f58ecef3
Signed-off-by: Jayasena Sangaraboina <jsanga@codeaurora.org>