gpio: rockchip: fix OF node leak in probe()

Driver code is leaking OF node reference from of_get_parent() in
probe().

Fixes: 936ee26 ("gpio/rockchip: add driver for rockchip gpio")
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Heiko Stuebner <[email protected]>
Reviewed-by: Shawn Lin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: krzk

drivers/gpio/gpio-rockchip.c

@@ -713,6 +713,7 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
 		return -ENODEV;
 
 	pctldev = of_pinctrl_get(pctlnp);
+	of_node_put(pctlnp);
 	if (!pctldev)
 		return -EPROBE_DEFER;