cpsw: Hook up default ndo_change_mtu.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index c68c9d9..6685bbb 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -665,6 +665,7 @@
 	.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