usb: phy: phy-am335x-control: delete unnecessary 'out of memory' messages

The memory subsystem has already had similar message for it.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/phy/phy-am335x-control.c

@@ -147,10 +147,8 @@ static int am335x_control_usb_probe(struct platform_device *pdev)
 	phy_ctrl = of_id->data;
 
 	ctrl_usb = devm_kzalloc(&pdev->dev, sizeof(*ctrl_usb), GFP_KERNEL);
-	if (!ctrl_usb) {
-		dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
+	if (!ctrl_usb)
 		return -ENOMEM;
-	}
 
 	ctrl_usb->dev = &pdev->dev;