sh_eth: simplify link auto-negotiation by ethtool

There is no need to call a heavyweight phy_start_aneg() for phy
auto-negotiation by ethtool, the phy is already initialized and
link auto-negotiation is started by calling phy_start() from
sh_eth_phy_start() when a network device is opened.
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/sh_eth.c

@@ -2249,7 +2249,7 @@ static int sh_eth_nway_reset(struct net_device *ndev)
 	if (!ndev->phydev)
 		return -ENODEV;
 
-	return phy_start_aneg(ndev->phydev);
+	return phy_restart_aneg(ndev->phydev);
 }
 
 static u32 sh_eth_get_msglevel(struct net_device *ndev)