usb: dwc2: pci: Move devm_kzalloc() before platform_device_add()

After platform_device_add(), if we error out, we must do
platform_device_unregister(), which also does the put. So lets move
devm_kzalloc() to simplify error handling and avoid calling of
platform_device_unregister().
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc2/pci.c

@@ -140,16 +140,16 @@ static int dwc2_pci_probe(struct pci_dev *pci,
 	if (ret)
 		goto err;
 
+	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
+	if (!glue)
+		return -ENOMEM;
+
 	ret = platform_device_add(dwc2);
 	if (ret) {
 		dev_err(dev, "failed to register dwc2 device\n");
 		goto err;
 	}
 
-	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
-	if (!glue)
-		return -ENOMEM;
-
 	glue->phy = phy;
 	glue->dwc2 = dwc2;
 	pci_set_drvdata(pci, glue);