usb: dwc3: pci: rely on default PM callbacks from PCI driver utility

There is nothing specific being done in the suspend and
resume callbacks that is not already taken care of in PCI
driver core, so dropping the functions.

Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/dwc3/dwc3-pci.c

@@ -156,45 +156,11 @@ static const struct pci_device_id dwc3_pci_id_table[] = {
 };
 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 
-#ifdef CONFIG_PM_SLEEP
-static int dwc3_pci_suspend(struct device *dev)
-{
-	struct pci_dev	*pci = to_pci_dev(dev);
-
-	pci_disable_device(pci);
-
-	return 0;
-}
-
-static int dwc3_pci_resume(struct device *dev)
-{
-	struct pci_dev	*pci = to_pci_dev(dev);
-	int		ret;
-
-	ret = pci_enable_device(pci);
-	if (ret) {
-		dev_err(dev, "can't re-enable device --> %d\n", ret);
-		return ret;
-	}
-
-	pci_set_master(pci);
-
-	return 0;
-}
-#endif /* CONFIG_PM_SLEEP */
-
-static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
-};
-
 static struct pci_driver dwc3_pci_driver = {
 	.name		= "dwc3-pci",
 	.id_table	= dwc3_pci_id_table,
 	.probe		= dwc3_pci_probe,
 	.remove		= dwc3_pci_remove,
-	.driver		= {
-		.pm	= &dwc3_pci_dev_pm_ops,
-	},
 };
 
 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");