netdev: Use default implementation of ethtool_ops::get_link where possible

Various drivers are using implementations of ethtool_ops::get_link
that are equivalent to the default ethtool_op_get_link().  Change
them to use that instead.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/pxa168_eth.c b/drivers/net/pxa168_eth.c
index 18c0297..04ed27d 100644
--- a/drivers/net/pxa168_eth.c
+++ b/drivers/net/pxa168_eth.c
@@ -1450,16 +1450,11 @@
 	strncpy(info->bus_info, "N/A", 32);
 }
 
-static u32 pxa168_get_link(struct net_device *dev)
-{
-	return !!netif_carrier_ok(dev);
-}
-
 static const struct ethtool_ops pxa168_ethtool_ops = {
 	.get_settings = pxa168_get_settings,
 	.set_settings = pxa168_set_settings,
 	.get_drvinfo = pxa168_get_drvinfo,
-	.get_link = pxa168_get_link,
+	.get_link = ethtool_op_get_link,
 };
 
 static const struct net_device_ops pxa168_eth_netdev_ops = {