V4L/DVB: videobuf: add ext_lock argument to the queue init functions

Add an ext_lock argument to the videobuf init functions. This allows
drivers to pass the vdev->lock pointer (or any other externally held lock)
to videobuf. For now all drivers just pass NULL.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/saa7134/saa7134-video.c b/drivers/media/video/saa7134/saa7134-video.c
index 645224c..fae5e97 100644
--- a/drivers/media/video/saa7134/saa7134-video.c
+++ b/drivers/media/video/saa7134/saa7134-video.c
@@ -1366,13 +1366,13 @@
 			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
 			    V4L2_FIELD_INTERLACED,
 			    sizeof(struct saa7134_buf),
-			    fh);
+			    fh, NULL);
 	videobuf_queue_sg_init(&fh->vbi, &saa7134_vbi_qops,
 			    &dev->pci->dev, &dev->slock,
 			    V4L2_BUF_TYPE_VBI_CAPTURE,
 			    V4L2_FIELD_SEQ_TB,
 			    sizeof(struct saa7134_buf),
-			    fh);
+			    fh, NULL);
 	saa7134_pgtable_alloc(dev->pci,&fh->pt_cap);
 	saa7134_pgtable_alloc(dev->pci,&fh->pt_vbi);