net: ocelot: add support to get port mac from device-tree

Add support to get mac from device-tree using of_get_ethdev_address.
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mscc/ocelot_net.c

@@ -1695,7 +1695,10 @@ int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *target,
 		NETIF_F_HW_TC;
 	dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_TC;
 
+	err = of_get_ethdev_address(portnp, dev);
+	if (err)
 		eth_hw_addr_gen(dev, ocelot->base_mac, port);
+
 	ocelot_mact_learn(ocelot, PGID_CPU, dev->dev_addr,
 			  OCELOT_VLAN_UNAWARE_PVID, ENTRYTYPE_LOCKED);