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/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index dd2b6a7..ce31e74 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -1514,11 +1514,6 @@
 	return genphy_restart_aneg(mp->phy);
 }
 
-static u32 mv643xx_eth_get_link(struct net_device *dev)
-{
-	return !!netif_carrier_ok(dev);
-}
-
 static int
 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
 {
@@ -1658,7 +1653,7 @@
 	.set_settings		= mv643xx_eth_set_settings,
 	.get_drvinfo		= mv643xx_eth_get_drvinfo,
 	.nway_reset		= mv643xx_eth_nway_reset,
-	.get_link		= mv643xx_eth_get_link,
+	.get_link		= ethtool_op_get_link,
 	.get_coalesce		= mv643xx_eth_get_coalesce,
 	.set_coalesce		= mv643xx_eth_set_coalesce,
 	.get_ringparam		= mv643xx_eth_get_ringparam,