l2tp: Use eth_<foo>_addr instead of memset

Use the built-in function instead of memset.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/l2tp/l2tp_eth.c

@@ -74,7 +74,7 @@ static int l2tp_eth_dev_init(struct net_device *dev)
 
 	priv->dev = dev;
 	eth_hw_addr_random(dev);
-	memset(&dev->broadcast[0], 0xff, 6);
+	eth_broadcast_addr(dev->broadcast);
 	dev->qdisc_tx_busylock = &l2tp_eth_tx_busylock;
 	return 0;
 }