macvlan: use netdev_is_rx_handler_busy instead of checking specific type

netdev_is_rx_handler_busy() check is a superset of netif_is_ipvlan_port()
check and hence should be preferred.
Signed-off-by: NMahesh Bandewar <maheshb@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/macvlan.c

@@ -1110,7 +1110,7 @@ static int macvlan_port_create(struct net_device *dev)
 	if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
 		return -EINVAL;
 
-	if (netif_is_ipvlan_port(dev))
+	if (netdev_is_rx_handler_busy(dev))
 		return -EBUSY;
 
 	port = kzalloc(sizeof(*port), GFP_KERNEL);