media: nuvoton: Stop direct calls to queue num_buffers field

Use vb2_get_num_buffers() to avoid using queue num_buffers field directly.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
CC: Joseph Liu <kwliu@nuvoton.com>
CC: Marvin Lin <kflin@nuvoton.com>

drivers/media/platform/nuvoton/npcm-video.c

@@ -393,7 +393,7 @@ static void npcm_video_free_diff_table(struct npcm_video *video)
 	struct rect_list *tmp;
 	unsigned int i;
 
-	for (i = 0; i < video->queue.num_buffers; i++) {
+	for (i = 0; i < vb2_get_num_buffers(&video->queue); i++) {
 		head = &video->list[i];
 		list_for_each_safe(pos, nx, head) {
 			tmp = list_entry(pos, struct rect_list, list);