net: make ndo_get_stats64 a void function

The network device operation for reading statistics is only called
in one place, and it ignores the return value. Having a structure
return value is potentially confusing because some future driver could
incorrectly assume that the return value was used.

Fix all drivers with ndo_get_stats64 to have a void function.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/intel/e1000e/e1000.h

@@ -493,8 +493,8 @@ int e1000e_setup_rx_resources(struct e1000_ring *ring);
 int e1000e_setup_tx_resources(struct e1000_ring *ring);
 void e1000e_free_rx_resources(struct e1000_ring *ring);
 void e1000e_free_tx_resources(struct e1000_ring *ring);
-struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
-					     struct rtnl_link_stats64 *stats);
+void e1000e_get_stats64(struct net_device *netdev,
+			struct rtnl_link_stats64 *stats);
 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter);
 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter);
 void e1000e_get_hw_control(struct e1000_adapter *adapter);