net: mdio: ipq8064: replace ioremap() with devm_ioremap()

Use devm_ioremap() instead of ioremap() to avoid iounmap() missing.

Signed-off-by: Yang Yingliang <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/mdio/mdio-ipq8064.c

···
 	if (of_address_to_resource(np, 0, &res))
 		return -ENOMEM;
 
-	base = ioremap(res.start, resource_size(&res));
+	base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
 	if (!base)
 		return -ENOMEM;