net: ethernet: ti: am65-cpsw: Call of_node_put() on error path

This code returns directly but it should instead call of_node_put()
to drop some reference counts.

Fixes: dab2b26 ("net: ethernet: ti: am65-cpsw: Add support for SERDES configuration")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/e3012f0c-1621-40e6-bf7d-03c276f6e07f@kili.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/ti/am65-cpsw-nuss.c

@@ -2068,7 +2068,7 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
 		/* Initialize the Serdes PHY for the port */
 		ret = am65_cpsw_init_serdes_phy(dev, port_np, port);
 		if (ret)
-			return ret;
+			goto of_node_put;
 
 		port->slave.mac_only =
 				of_property_read_bool(port_np, "ti,mac-only");