phy: phy-mvebu-sata: Add missing error check for devm_kzalloc

Currently this driver is missing a check on the return value of devm_kzalloc,
which would cause a NULL pointer dereference in a OOM situation.

This patch adds the aformentioned missing check.
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/phy-mvebu-sata.c

@@ -89,6 +89,8 @@ static int phy_mvebu_sata_probe(struct platform_device *pdev)
 	struct phy *phy;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	priv->base = devm_ioremap_resource(&pdev->dev, res);