cxgb4: fix for new ndo_get_stats64 signature

The change to ndo_get_stats64 in "net: fix 64 bit counters on 32 bit arches"
missed cxgb4.  Fix it.
Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/cxgb4/cxgb4_main.c

@@ -2601,12 +2601,12 @@ static int cxgb_close(struct net_device *dev)
 	return t4_enable_vi(adapter, 0, pi->viid, false, false);
 }
 
-static struct rtnl_link_stats64 *cxgb_get_stats(struct net_device *dev)
+static struct rtnl_link_stats64 *cxgb_get_stats(struct net_device *dev,
+						struct rtnl_link_stats64 *ns)
 {
 	struct port_stats stats;
 	struct port_info *p = netdev_priv(dev);
 	struct adapter *adapter = p->adapter;
-	struct rtnl_link_stats64 *ns = &dev->stats64;
 
 	spin_lock(&adapter->stats_lock);
 	t4_get_port_stats(adapter, p->tx_chan, &stats);