[media] f_uvc: add v4l2_device and replace parent with v4l2_dev

This driver did not yet support struct v4l2_device, so add it. This
make it possible to replace the deprecated parent field with the
v4l2_dev field, allowing the eventual removal of the parent field.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/usb/gadget/uvc.h b/drivers/usb/gadget/uvc.h
index 817e9e1..7a9111d 100644
--- a/drivers/usb/gadget/uvc.h
+++ b/drivers/usb/gadget/uvc.h
@@ -57,6 +57,7 @@
 #include <linux/videodev2.h>
 #include <linux/version.h>
 #include <media/v4l2-fh.h>
+#include <media/v4l2-device.h>
 
 #include "uvc_queue.h"
 
@@ -145,6 +146,7 @@
 struct uvc_device
 {
 	struct video_device *vdev;
+	struct v4l2_device v4l2_dev;
 	enum uvc_state state;
 	struct usb_function func;
 	struct uvc_video video;