igb: Remove useless argument

Given that all callers of igb_update_stats() pass the same two arguments:
(adapter, &adapter->stats64), the second argument can be removed.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index ff4d907..06ffb2b 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -667,7 +667,7 @@ void igb_setup_tctl(struct igb_adapter *);
 void igb_setup_rctl(struct igb_adapter *);
 netdev_tx_t igb_xmit_frame_ring(struct sk_buff *, struct igb_ring *);
 void igb_alloc_rx_buffers(struct igb_ring *, u16);
-void igb_update_stats(struct igb_adapter *, struct rtnl_link_stats64 *);
+void igb_update_stats(struct igb_adapter *);
 bool igb_has_link(struct igb_adapter *adapter);
 void igb_set_ethtool_ops(struct net_device *);
 void igb_power_up_link(struct igb_adapter *);