net: ethernet: renesas: rswitch: Fix getting mac address from device tree

To get mac address from device tree which is from each ethernet-port,
fix the first argument of of_get_ethdev_address().

Fixes: 3590918b ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/rswitch.c

@@ -1578,6 +1578,7 @@ static int rswitch_device_alloc(struct rswitch_private *priv, int index)
 {
 	struct platform_device *pdev = priv->pdev;
 	struct rswitch_device *rdev;
+	struct device_node *port;
 	struct net_device *ndev;
 	int err;
 
@@ -1606,7 +1607,9 @@ static int rswitch_device_alloc(struct rswitch_private *priv, int index)
 
 	netif_napi_add(ndev, &rdev->napi, rswitch_poll);
 
-	err = of_get_ethdev_address(pdev->dev.of_node, ndev);
+	port = rswitch_get_port_node(rdev);
+	err = of_get_ethdev_address(port, ndev);
+	of_node_put(port);
 	if (err) {
 		if (is_valid_ether_addr(rdev->etha->mac_addr))
 			eth_hw_addr_set(ndev, rdev->etha->mac_addr);