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/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index 8984d16..3612900 100644
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -194,20 +194,6 @@
 	return 0;
 }
 
-static u32 e1000_get_link(struct net_device *netdev)
-{
-	struct e1000_adapter *adapter = netdev_priv(netdev);
-	struct e1000_hw *hw = &adapter->hw;
-
-	/*
-	 * Avoid touching hardware registers when possible, otherwise
-	 * link negotiation can get messed up when user-level scripts
-	 * are rapidly polling the driver to see if link is up.
-	 */
-	return netif_running(netdev) ? netif_carrier_ok(netdev) :
-	    !!(er32(STATUS) & E1000_STATUS_LU);
-}
-
 static int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
 {
 	struct e1000_mac_info *mac = &adapter->hw.mac;
@@ -2024,7 +2010,7 @@
 	.get_msglevel		= e1000_get_msglevel,
 	.set_msglevel		= e1000_set_msglevel,
 	.nway_reset		= e1000_nway_reset,
-	.get_link		= e1000_get_link,
+	.get_link		= ethtool_op_get_link,
 	.get_eeprom_len		= e1000_get_eeprom_len,
 	.get_eeprom		= e1000_get_eeprom,
 	.set_eeprom		= e1000_set_eeprom,