media: vicodec: Add support for stateless decoder.

Implement a stateless decoder for the new node.
Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: add 'return 0;' before default case in vicodec_try_ctrl()]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vicodec/codec-v4l2-fwht.h

@@ -44,6 +44,7 @@ struct v4l2_fwht_state {
 	struct fwht_raw_frame ref_frame;
 	struct fwht_cframe_hdr header;
 	u8 *compressed_frame;
+	u64 ref_frame_ts;
 };
 
 const struct v4l2_fwht_pixfmt_info *v4l2_fwht_find_pixfmt(u32 pixelformat);