PM / devfreq: rockchip-dfi: Convert to devm_platform_ioremap_resource

Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

drivers/devfreq/event/rockchip-dfi.c

@@ -177,7 +177,6 @@ static int rockchip_dfi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct rockchip_dfi *data;
-	struct resource *res;
 	struct devfreq_event_desc *desc;
 	struct device_node *np = pdev->dev.of_node, *node;
 
@@ -185,8 +184,7 @@ static int rockchip_dfi_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	data->regs = devm_ioremap_resource(&pdev->dev, res);
+	data->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(data->regs))
 		return PTR_ERR(data->regs);