media: atomisp: 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>

drivers/staging/media/atomisp/pci/atomisp_ioctl.c

@@ -1028,7 +1028,7 @@ static int atomisp_qbuf_wrapper(struct file *file, void *fh, struct v4l2_buffer
 	struct atomisp_device *isp = video_get_drvdata(vdev);
 	struct atomisp_video_pipe *pipe = atomisp_to_video_pipe(vdev);
 
-	if (buf->index >= vdev->queue->num_buffers)
+	if (buf->index >= vb2_get_num_buffers(vdev->queue))
 		return -EINVAL;
 
 	if (buf->reserved2 & ATOMISP_BUFFER_HAS_PER_FRAME_SETTING) {