net: ethoc: Make use of the helper function dev_err_probe()

When possible use dev_err_probe help to properly deal with the
PROBE_DEFER error, the benefit is that DEFER issue will be logged
in the devices_deferred debugfs file.
And using dev_err_probe() can reduce code size, and simplify the code.

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ethoc.c

@@ -707,20 +707,16 @@ static int ethoc_mdio_probe(struct net_device *dev)
 	else
 		phy = phy_find_first(priv->mdio);
 
-	if (!phy) {
-		dev_err(&dev->dev, "no PHY found\n");
-		return -ENXIO;
-	}
+	if (!phy)
+		return dev_err_probe(&dev->dev, -ENXIO, "no PHY found\n");
 
 	priv->old_duplex = -1;
 	priv->old_link = -1;
 
 	err = phy_connect_direct(dev, phy, ethoc_mdio_poll,
 				 PHY_INTERFACE_MODE_GMII);
-	if (err) {
-		dev_err(&dev->dev, "could not attach to PHY\n");
-		return err;
-	}
+	if (err)
+		return dev_err_probe(&dev->dev, err, "could not attach to PHY\n");
 
 	phy_set_max_speed(phy, SPEED_100);