octeon_ep: add ethtool support for Octeon PCI Endpoint NIC

Add support for the following ethtool commands:

ethtool -i|--driver devname
ethtool devname
ethtool -s devname [speed N] [autoneg on|off] [advertise N]
ethtool -S|--statistics devname
Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/octeon_ep/Makefile

@@ -6,4 +6,4 @@
 obj-$(CONFIG_OCTEON_EP) += octeon_ep.o
 
 octeon_ep-y := octep_main.o octep_cn9k_pf.o octep_tx.o octep_rx.o \
-	       octep_ctrl_mbox.o octep_ctrl_net.o
+	       octep_ethtool.o octep_ctrl_mbox.o octep_ctrl_net.o

drivers/net/ethernet/marvell/octeon_ep/octep_main.c

@@ -1059,6 +1059,7 @@ static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	INIT_WORK(&octep_dev->ctrl_mbox_task, octep_ctrl_mbox_task);
 
 	netdev->netdev_ops = &octep_netdev_ops;
+	octep_set_ethtool_ops(netdev);
 	netif_carrier_off(netdev);
 
 	netdev->hw_features = NETIF_F_SG;