[media] marvell-ccic: refine mcam_set_contig_buffer function

This patch refines mcam_set_contig_buffer() in mcam core.
It can remove redundant code line and enhance readability.
Signed-off-by: Albert Wang <twang13@marvell.com>
Signed-off-by: Libin Yang <lbyang@marvell.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/marvell-ccic/mcam-core.c

@@ -481,22 +481,21 @@ static void mcam_set_contig_buffer(struct mcam_camera *cam, int frame)
 	 */
 	if (list_empty(&cam->buffers)) {
 		buf = cam->vb_bufs[frame ^ 0x1];
-		cam->vb_bufs[frame] = buf;
-		mcam_reg_write(cam, frame == 0 ? REG_Y0BAR : REG_Y1BAR,
-				vb2_dma_contig_plane_dma_addr(&buf->vb_buf, 0));
 		set_bit(CF_SINGLE_BUFFER, &cam->flags);
 		cam->frame_state.singles++;
-		return;
-	}
+	} else {
 		/*
 		 * OK, we have a buffer we can use.
 		 */
-	buf = list_first_entry(&cam->buffers, struct mcam_vb_buffer, queue);
+		buf = list_first_entry(&cam->buffers, struct mcam_vb_buffer,
+					queue);
 		list_del_init(&buf->queue);
+		clear_bit(CF_SINGLE_BUFFER, &cam->flags);
+	}
+
+	cam->vb_bufs[frame] = buf;
 	mcam_reg_write(cam, frame == 0 ? REG_Y0BAR : REG_Y1BAR,
 			vb2_dma_contig_plane_dma_addr(&buf->vb_buf, 0));
-	cam->vb_bufs[frame] = buf;
-	clear_bit(CF_SINGLE_BUFFER, &cam->flags);
 }
 
 /*