net: cxgb: Use net_device_stats from struct net_device

Instead of using a private copy of struct net_device_stats in struct
port_info, use stats from struct net_device.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb/common.h

@@ -223,7 +223,6 @@ struct port_info {
 	struct cmac *mac;
 	struct cphy *phy;
 	struct link_config link_config;
-	struct net_device_stats netstats;
 };
 
 struct sge;