net: ethernet: ixp4xx_eth: Use devm_platform_get_and_ioremap_resource()

Use devm_platform_get_and_ioremap_resource() to simplify
code.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/xscale/ixp4xx_eth.c

@@ -1425,7 +1425,6 @@ static int ixp4xx_eth_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	struct eth_plat_info *plat;
 	struct net_device *ndev;
-	struct resource *res;
 	struct port *port;
 	int err;
 
@@ -1482,10 +1481,7 @@ static int ixp4xx_eth_probe(struct platform_device *pdev)
 	port->id = plat->npe;
 
 	/* Get the port resource and remap */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-	port->regs = devm_ioremap_resource(dev, res);
+	port->regs = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
 	if (IS_ERR(port->regs))
 		return PTR_ERR(port->regs);