mips/pci: use devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately
Signed-off-by: zhang songyi <zhang.songyi@zte.com.cn>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/pci/pci-rt3883.c

@@ -404,7 +404,6 @@ static int rt3883_pci_probe(struct platform_device *pdev)
 	struct rt3883_pci_controller *rpc;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
-	struct resource *res;
 	struct device_node *child;
 	u32 val;
 	int err;
@@ -414,8 +413,7 @@ static int rt3883_pci_probe(struct platform_device *pdev)
 	if (!rpc)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	rpc->base = devm_ioremap_resource(dev, res);
+	rpc->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(rpc->base))
 		return PTR_ERR(rpc->base);