pinctrl: mediatek: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20191016141053.23740-1-yuehaibing@huawei.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/pinctrl-mtk-common.c

@@ -982,7 +982,6 @@ static const struct mtk_eint_xt mtk_eint_xt = {
 static int mtk_eint_init(struct mtk_pinctrl *pctl, struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	struct resource *res;
 
 	if (!of_property_read_bool(np, "interrupt-controller"))
 		return -ENODEV;
@@ -991,8 +990,7 @@ static int mtk_eint_init(struct mtk_pinctrl *pctl, struct platform_device *pdev)
 	if (!pctl->eint)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	pctl->eint->base = devm_ioremap_resource(&pdev->dev, res);
+	pctl->eint->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(pctl->eint->base))
 		return PTR_ERR(pctl->eint->base);