media: cedrus: set requires_requests

The cedrus stateless decoder requires the use of request, so
indicate this by setting requires_requests to 1.

Note that the cedrus driver never checked for this, and as far
as I can tell would just crash if an attempt was made to queue
a buffer without a request.

Signed-off-by: Hans Verkuil <[e-mail]>
Acked-by: Paul Kocialkowski <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/staging/media/sunxi/cedrus/cedrus_video.c

···
 	src_vq->lock = &ctx->dev->dev_mutex;
 	src_vq->dev = ctx->dev->dev;
 	src_vq->supports_requests = true;
+	src_vq->requires_requests = true;
 
 	ret = vb2_queue_init(src_vq);
 	if (ret)