net: fec: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fec_main.c

@@ -3338,7 +3338,6 @@ fec_probe(struct platform_device *pdev)
 	struct fec_platform_data *pdata;
 	struct net_device *ndev;
 	int i, irq, ret = 0;
-	struct resource *r;
 	const struct of_device_id *of_id;
 	static int dev_id;
 	struct device_node *np = pdev->dev.of_node, *phy_node;
@@ -3378,8 +3377,7 @@ fec_probe(struct platform_device *pdev)
 	/* Select default pin state */
 	pinctrl_pm_select_default_state(&pdev->dev);
 
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	fep->hwp = devm_ioremap_resource(&pdev->dev, r);
+	fep->hwp = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(fep->hwp)) {
 		ret = PTR_ERR(fep->hwp);
 		goto failed_ioremap;