net: sxgbe: sxgbe_mdio_register() frees the bus

"err" is always zero at this point so we always unregister and free the
mdio_bus before returning success.  This seems like left over code and
I have deleted it.

Fixes: 1edb9ca6 ('net: sxgbe: add basic framework for Samsung 10Gb ethernet driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/samsung/sxgbe/sxgbe_mdio.c

@@ -219,13 +219,6 @@ int sxgbe_mdio_register(struct net_device *ndev)
 		}
 	}
 
-	if (!err) {
-		netdev_err(ndev, "PHY not found\n");
-		mdiobus_unregister(mdio_bus);
-		mdiobus_free(mdio_bus);
-		goto mdiobus_err;
-	}
-
 	priv->mii = mdio_bus;
 
 	return 0;