v4l: vsp1: Extend vsp1_du_atomic_flush to return frame index

We need to be able to identify the frame sequences that we have queued,
vs the frames that have completed. Return a sequence number to the
caller of vsp1_du_atomic_flush() such that it can be compared with the
completion sequence number

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
2 files changed