pinctrl: renesas: rzg2l: remove unnecessary check from rzg2l_dt_node_to_map()

This patch removes the unnecessary check from rzg2l_dt_node_to_map()
as the ret value is already negative.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20221108191309.3908415-1-biju.das.jz@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

drivers/pinctrl/renesas/pinctrl-rzg2l.c

@@ -435,8 +435,7 @@ static int rzg2l_dt_node_to_map(struct pinctrl_dev *pctldev,
 	ret = -EINVAL;
 
 done:
-	if (ret < 0)
-		rzg2l_dt_free_map(pctldev, *map, *num_maps);
+	rzg2l_dt_free_map(pctldev, *map, *num_maps);
 
 	return ret;
 }