cpsw: Hook up default ndo_change_mtu.

Reported-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/cpsw.c

@@ -665,6 +665,7 @@ static const struct net_device_ops cpsw_netdev_ops = {
 	.ndo_start_xmit		= cpsw_ndo_start_xmit,
 	.ndo_change_rx_flags	= cpsw_ndo_change_rx_flags,
 	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_change_mtu		= eth_change_mtu,
 	.ndo_tx_timeout		= cpsw_ndo_tx_timeout,
 	.ndo_get_stats		= cpsw_ndo_get_stats,
 #ifdef CONFIG_NET_POLL_CONTROLLER