media: vb2: fix confusing log message

If the number of allocated buffers is less than q->min_queued_buffers,
then a debug message was logged saying that it needs at least that
many queued buffers. But the test is about allocated buffers.

Update the message to say "allocated buffers".

Signed-off-by: Hans Verkuil <[e-mail]>
Reviewed-by: Nicolas Dufresne <[e-mail]>
Acked-by: Tomasz Figa <[e-mail]>

drivers/media/common/videobuf2/videobuf2-core.c

···
 	}
 
 	if (q_num_bufs < q->min_queued_buffers) {
-		dprintk(q, 1, "need at least %u queued buffers\n",
+		dprintk(q, 1, "need at least %u allocated buffers\n",
 			q->min_queued_buffers);
 		return -EINVAL;
 	}