[PATCH net] phy: mvebu-cp110: checking for NULL instead of IS_ERR()

[Dan Carpenter]

devm_ioremap_resource() never returns NULL, it only returns error
pointers so this test needs to be changed.

Fixes: d0438bd6aa09 ("phy: add the mvebu cp110 comphy driver")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
This driver apparently is going through the net tree, but netdev isn't
listed as handling it in MAINTAINERS.  Kishon, do you know what's up
with that?

diff --git a/drivers/phy/marvell/phy-mvebu-cp110-comphy.c 
b/drivers/phy/marvell/phy-mvebu-cp110-comphy.c
index 73ebad6634a7..24578bd68ddc 100644
--- a/drivers/phy/marvell/phy-mvebu-cp110-comphy.c
+++ b/drivers/phy/marvell/phy-mvebu-cp110-comphy.c
@@ -576,8 +576,8 @@ static int mvebu_comphy_probe(struct platform_device *pdev)
                return PTR_ERR(priv->regmap);
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        priv->base = devm_ioremap_resource(&pdev->dev, res);
-       if (!priv->base)
-               return -ENOMEM;
+       if (IS_ERR(priv->base))
+               return PTR_ERR(priv->base);
 
        for_each_available_child_of_node(pdev->dev.of_node, child) {
                struct mvebu_comphy_lane *lane;