net: ethernet: dnet: convert to devm_platform_get_and_ioremap_resource

use devm_platform_get_and_ioremap_resource() to simplify code, which
contains platform_get_resource() and devm_ioremap_resource(), it also
get the resource for use by the following code.
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/dnet.c

@@ -776,8 +776,7 @@ static int dnet_probe(struct platform_device *pdev)
 
 	spin_lock_init(&bp->lock);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	bp->regs = devm_ioremap_resource(&pdev->dev, res);
+	bp->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(bp->regs)) {
 		err = PTR_ERR(bp->regs);
 		goto err_out_free_dev;