net: w5300: Use devm_ioremap_resource()

Use devm_ioremap_resource() in order to make the code simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/wiznet/w5300.c

@@ -561,11 +561,10 @@ static int w5300_hw_probe(struct platform_device *pdev)
 	if (!mem)
 		return -ENXIO;
 	mem_size = resource_size(mem);
-	if (!devm_request_mem_region(&pdev->dev, mem->start, mem_size, name))
-		return -EBUSY;
-	priv->base = devm_ioremap(&pdev->dev, mem->start, mem_size);
-	if (!priv->base)
-		return -EBUSY;
+
+	priv->base = devm_ioremap_resource(&pdev->dev, mem);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
 
 	spin_lock_init(&priv->reg_lock);
 	priv->indirect = mem_size < W5300_BUS_DIRECT_SIZE;