msm: vidc: Add support for sub-frame info

Convey sub-frame information to client from FW.

Change-Id: I41755b6e256653f92b893d9bb37eb16175edc18a
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>
Signed-off-by: Umesh Pandey <umeshp@codeaurora.org>
Signed-off-by: Praveen Chavan <pchavan@codeaurora.org>
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>