usb: cdns3: fix NULL pointer dereference on no platform data

Some platforms (e.g. TI) will not have any platform data which will
lead to NULL pointer dereference if we don't check for NULL pdata.

Fixes: 7cea9657 ("usb: cdns3: add quirk for enable runtime pm by default")
Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

drivers/usb/cdns3/core.c

@@ -559,7 +559,7 @@ static int cdns3_probe(struct platform_device *pdev)
 	device_set_wakeup_capable(dev, true);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
-	if (!(cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))
+	if (!(cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW)))
 		pm_runtime_forbid(dev);
 
 	/*

drivers/usb/cdns3/host.c

@@ -59,7 +59,7 @@ static int __cdns3_host_init(struct cdns3 *cdns)
 		goto err1;
 	}
 
-	if (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW)
+	if (cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))
 		cdns->xhci_plat_data->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
 
 	ret = platform_device_add_data(xhci, cdns->xhci_plat_data,