WAN: Convert generic HDLC drivers to netdev_ops.

Also remove unneeded last_rx update from Synclink drivers.
Synclink part mostly by Stephen Hemminger.

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index d80b72e..0d7ba11 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -427,6 +427,15 @@
 }
 module_exit(cosa_exit);
 
+static const struct net_device_ops cosa_ops = {
+	.ndo_open       = cosa_net_open,
+	.ndo_stop       = cosa_net_close,
+	.ndo_change_mtu = hdlc_change_mtu,
+	.ndo_start_xmit = hdlc_start_xmit,
+	.ndo_do_ioctl   = cosa_net_ioctl,
+	.ndo_tx_timeout = cosa_net_timeout,
+};
+
 static int cosa_probe(int base, int irq, int dma)
 {
 	struct cosa_data *cosa = cosa_cards+nr_cards;
@@ -575,10 +584,7 @@
 		}
 		dev_to_hdlc(chan->netdev)->attach = cosa_net_attach;
 		dev_to_hdlc(chan->netdev)->xmit = cosa_net_tx;
-		chan->netdev->open = cosa_net_open;
-		chan->netdev->stop = cosa_net_close;
-		chan->netdev->do_ioctl = cosa_net_ioctl;
-		chan->netdev->tx_timeout = cosa_net_timeout;
+		chan->netdev->netdev_ops = &cosa_ops;
 		chan->netdev->watchdog_timeo = TX_TIMEOUT;
 		chan->netdev->base_addr = chan->cosa->datareg;
 		chan->netdev->irq = chan->cosa->irq;