[media] tc358743: only queue subdev notifications if devnode is set

Hardware interrupts are enabled in the probe function, before the subdev
is registered to its v4l2_device. Until v4l2_device_register_subdev_node
is called, sd->devnode is NULL and v4l2_subdev_notify_event must not be
called.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/i2c/tc358743.c

@@ -870,7 +870,8 @@ static void tc358743_format_change(struct v4l2_subdev *sd)
 				&timings, false);
 	}
 
-	v4l2_subdev_notify_event(sd, &tc358743_ev_fmt);
+	if (sd->devnode)
+		v4l2_subdev_notify_event(sd, &tc358743_ev_fmt);
 }
 
 static void tc358743_init_interrupts(struct v4l2_subdev *sd)