ixgb: convert to ndo_fix_features

Private rx_csum flags are now duplicate of netdev->features & NETIF_F_RXCSUM.
Removing this needs deeper surgery.

Things noticed:
 - ixgb has RX csum disabled by default
 - HW VLAN acceleration probably can be toggled, but it's left as is
 - the resets on RX csum offload change can probably be avoided
 - there is A LOT of copy-and-pasted code here

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb.h b/drivers/net/ethernet/intel/ixgb/ixgb.h
index 49e8408..cb23448 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb.h
+++ b/drivers/net/ethernet/intel/ixgb/ixgb.h
@@ -204,6 +204,8 @@
 extern char ixgb_driver_name[];
 extern const char ixgb_driver_version[];
 
+extern void ixgb_set_speed_duplex(struct net_device *netdev);
+
 extern int ixgb_up(struct ixgb_adapter *adapter);
 extern void ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog);
 extern void ixgb_reset(struct ixgb_adapter *adapter);