net: ethernet: marvell: mvneta: fix fixed-link phydev leaks

Make sure to deregister and free any fixed-link PHY registered using
of_phy_register_fixed_link() on probe errors and on driver unbind.

Fixes: 83895bedeee6 ("net: mvneta: add support for fixed links")
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/mvneta.c

@@ -4191,6 +4191,8 @@ err_clk:
 	clk_disable_unprepare(pp->clk);
 err_put_phy_node:
 	of_node_put(phy_node);
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 err_free_irq:
 	irq_dispose_mapping(dev->irq);
 err_free_netdev:
@@ -4202,6 +4204,7 @@ err_free_netdev:
 static int mvneta_remove(struct platform_device *pdev)
 {
 	struct net_device  *dev = platform_get_drvdata(pdev);
+	struct device_node *dn = pdev->dev.of_node;
 	struct mvneta_port *pp = netdev_priv(dev);
 
 	unregister_netdev(dev);
@@ -4209,6 +4212,8 @@ static int mvneta_remove(struct platform_device *pdev)
 	clk_disable_unprepare(pp->clk);
 	free_percpu(pp->ports);
 	free_percpu(pp->stats);
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 	irq_dispose_mapping(dev->irq);
 	of_node_put(pp->phy_node);
 	free_netdev(dev);