can: sun4i: 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>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/sun4i_can.c

@@ -771,7 +771,6 @@ static int sun4ican_remove(struct platform_device *pdev)
 static int sun4ican_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	struct resource *mem;
 	struct clk *clk;
 	void __iomem *addr;
 	int err, irq;
@@ -791,8 +790,7 @@ static int sun4ican_probe(struct platform_device *pdev)
 		goto exit;
 	}
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	addr = devm_ioremap_resource(&pdev->dev, mem);
+	addr = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(addr)) {
 		err = -EBUSY;
 		goto exit;