of_mdio: get_phy_device() doesn't return NULL anymore

Now that get_phy_device() no longer returns NULL on error, we don't need
to check for it...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 2c1e52e..b622b33 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -56,7 +56,7 @@
 		phy = phy_device_create(mdio, addr, phy_id, 0, NULL);
 	else
 		phy = get_phy_device(mdio, addr, is_c45);
-	if (IS_ERR_OR_NULL(phy))
+	if (IS_ERR(phy))
 		return;
 
 	rc = irq_of_parse_and_map(child, 0);