v4l2: Add V4L2 control for getting seq_hdr in syncframe

Add v4l2 control V4L2_CID_QCOM_VIDEO_SYNC_FRAME_SEQ_HDR, this control
configures video hardware to enable/disable codecconfig data to be
packed with every syncframe. This has to be configured before
encoding starts.

CRs-fixed: 396716
Change-Id: I14bf83cb8583656a6a040be4f38ec0e5dea36a25
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>