bcm63xx_enet: 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: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bcm63xx_enet.c

@@ -1693,7 +1693,7 @@ static int bcm_enet_probe(struct platform_device *pdev)
 	struct bcm_enet_priv *priv;
 	struct net_device *dev;
 	struct bcm63xx_enet_platform_data *pd;
-	struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
+	struct resource *res_irq, *res_irq_rx, *res_irq_tx;
 	struct mii_bus *bus;
 	int i, ret;
 
@@ -1719,8 +1719,7 @@ static int bcm_enet_probe(struct platform_device *pdev)
 	if (ret)
 		goto out;
 
-	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	priv->base = devm_ioremap_resource(&pdev->dev, res_mem);
+	priv->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(priv->base)) {
 		ret = PTR_ERR(priv->base);
 		goto out;
@@ -2762,15 +2761,13 @@ struct platform_driver bcm63xx_enetsw_driver = {
 /* reserve & remap memory space shared between all macs */
 static int bcm_enet_shared_probe(struct platform_device *pdev)
 {
-	struct resource *res;
 	void __iomem *p[3];
 	unsigned int i;
 
 	memset(bcm_enet_shared_base, 0, sizeof(bcm_enet_shared_base));
 
 	for (i = 0; i < 3; i++) {
-		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
-		p[i] = devm_ioremap_resource(&pdev->dev, res);
+		p[i] = devm_platform_ioremap_resource(pdev, i);
 		if (IS_ERR(p[i]))
 			return PTR_ERR(p[i]);
 	}