[media] media v4l2-mem2mem: fix src/out and dst/cap num_rdy

src bufs belong to out queue, dst bufs belong to in queue. Currently
this is not a real problem since all users currently need exactly one
input and one output buffer.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

include/media/v4l2-mem2mem.h

@@ -140,7 +140,7 @@ void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_buffer *vb);
 static inline
 unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
 {
-	return m2m_ctx->cap_q_ctx.num_rdy;
+	return m2m_ctx->out_q_ctx.num_rdy;
 }
 
 /**
@@ -150,7 +150,7 @@ unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
 static inline
 unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
 {
-	return m2m_ctx->out_q_ctx.num_rdy;
+	return m2m_ctx->cap_q_ctx.num_rdy;
 }
 
 void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx);