ipvlan: Remove redundant if statements

The 'if (dev)' statement already move into dev_{put , hold}, so remove
redundant if statements.
Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipvlan/ipvlan_core.c

@@ -291,7 +291,6 @@ void ipvlan_process_multicast(struct work_struct *work)
 			else
 				kfree_skb(skb);
 		}
-		if (dev)
 		dev_put(dev);
 		cond_resched();
 	}

drivers/net/ipvlan/ipvlan_main.c

@@ -100,7 +100,6 @@ static void ipvlan_port_destroy(struct net_device *dev)
 	netdev_rx_handler_unregister(dev);
 	cancel_work_sync(&port->wq);
 	while ((skb = __skb_dequeue(&port->backlog)) != NULL) {
-		if (skb->dev)
 		dev_put(skb->dev);
 		kfree_skb(skb);
 	}