media: lmedm04: Add missing usb_free_urb to free interrupt urb.

The interrupt urb is killed but never freed add the function
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/usb/dvb-usb-v2/lmedm04.c

@@ -1229,6 +1229,7 @@ static void lme2510_exit(struct dvb_usb_device *d)
 		usb_kill_urb(st->lme_urb);
 		usb_free_coherent(d->udev, 128, st->buffer,
 				  st->lme_urb->transfer_dma);
+		usb_free_urb(st->lme_urb);
 		info("Interrupt Service Stopped");
 	}
 }