drivers: gpio: loongon1: use devm_platform_ioremap_resource()

Use the new helper that wraps the calls to platform_get_resource()
and devm_ioremap_resource() together.

Signed-off-by: Enrico Weigelt, metux IT consult <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-loongson1.c

···
 {
 	struct device *dev = &pdev->dev;
 	struct gpio_chip *gc;
-	struct resource *res;
 	int ret;
 
 	gc = devm_kzalloc(dev, sizeof(*gc), GFP_KERNEL);
 	if (!gc)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	gpio_reg_base = devm_ioremap_resource(dev, res);
+	gpio_reg_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(gpio_reg_base))
 		return PTR_ERR(gpio_reg_base);