[media] redrat3: fix sparse warning

Fix this sparse warning:

drivers/media/rc/redrat3.c:490:18: warning: incorrect type in assignment (different base types)
drivers/media/rc/redrat3.c:495:9: warning: cast to restricted __be32
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/rc/redrat3.c

@@ -480,7 +480,7 @@ static int redrat3_set_timeout(struct rc_dev *rc_dev, unsigned int timeoutns)
 	struct redrat3_dev *rr3 = rc_dev->priv;
 	struct usb_device *udev = rr3->udev;
 	struct device *dev = rr3->dev;
-	u32 *timeout;
+	__be32 *timeout;
 	int ret;
 
 	timeout = kmalloc(sizeof(*timeout), GFP_KERNEL);