pinctrl: meson: amlogic-a4: Fix device node reference leak in bank helpers

of_parse_phandle_with_fixed_args() increments the reference count of the
returned device node, so it must be explicitly released using
of_node_put() after use.

Fix the reference leak in aml_bank_pins() and aml_bank_number() by
adding the missing of_node_put() calls.

Fixes: 6e9be3a ("pinctrl: Add driver support for Amlogic SoCs")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Reviewed-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>

Author: outman119

drivers/pinctrl/meson/pinctrl-amlogic-a4.c

@@ -725,8 +725,9 @@ static u32 aml_bank_pins(struct device_node *np)
 	if (of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3,
 					     0, &of_args))
 		return 0;
-	else
-		return of_args.args[2];
+
+	of_node_put(of_args.np);
+	return of_args.args[2];
 }
 
 static int aml_bank_number(struct device_node *np)
@@ -736,8 +737,9 @@ static int aml_bank_number(struct device_node *np)
 	if (of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3,
 					     0, &of_args))
 		return -EINVAL;
-	else
-		return of_args.args[1] >> 8;
+
+	of_node_put(of_args.np);
+	return of_args.args[1] >> 8;
 }
 
 static unsigned int aml_count_pins(struct device_node *np)