usb: dwc3: host: Change platform device ID for xhci-hcd to AUTO

Multiple dwc3 controllers will try to allocate multiple xhci-hcd
interfaces.
Changing platform device IDs from NONE to AUTO to support
such cases.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/dwc3/host.c

@@ -44,7 +44,7 @@ int dwc3_host_init(struct dwc3 *dwc)
 	struct platform_device	*xhci;
 	int			ret;
 
-	xhci = platform_device_alloc("xhci-hcd", -1);
+	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
 	if (!xhci) {
 		dev_err(dwc->dev, "couldn't allocate xHCI device\n");
 		ret = -ENOMEM;