net: dsa: sja1105: use xpcs_create_mdiodev()

Use the new xpcs_create_mdiodev() creator, which simplifies the
creation and destruction of the mdio device associated with xpcs.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Russell King (Oracle)

drivers/net/dsa/sja1105/sja1105_mdio.c

@@ -400,7 +400,6 @@ static int sja1105_mdiobus_pcs_register(struct sja1105_private *priv)
 	}
 
 	for (port = 0; port < ds->num_ports; port++) {
-		struct mdio_device *mdiodev;
 		struct dw_xpcs *xpcs;
 
 		if (dsa_is_unused_port(ds, port))
@@ -410,14 +409,7 @@ static int sja1105_mdiobus_pcs_register(struct sja1105_private *priv)
 		    priv->phy_mode[port] != PHY_INTERFACE_MODE_2500BASEX)
 			continue;
 
-		mdiodev = mdio_device_create(bus, port);
-		if (IS_ERR(mdiodev)) {
-			rc = PTR_ERR(mdiodev);
-			goto out_pcs_free;
-		}
-
-		xpcs = xpcs_create(mdiodev, priv->phy_mode[port]);
-		mdio_device_put(mdiodev);
+		xpcs = xpcs_create_mdiodev(bus, port, priv->phy_mode[port]);
 		if (IS_ERR(xpcs)) {
 			rc = PTR_ERR(xpcs);
 			goto out_pcs_free;