[Bluetooth] Add support for AVM BlueFRITZ! USB v2.0

This patch adds the vendor and product id for the AVM BlueFRITZ! USB v2.0
dongle which don't uses the USB Bluetooth class id.

drivers/bluetooth/hci_usb.c

@@ -73,6 +73,9 @@ static struct usb_device_id bluetooth_ids[] = {
 	/* Generic Bluetooth USB device */
 	{ USB_DEVICE_INFO(HCI_DEV_CLASS, HCI_DEV_SUBCLASS, HCI_DEV_PROTOCOL) },
 
+	/* AVM BlueFRITZ! USB v2.0 */
+	{ USB_DEVICE(0x057c, 0x3800) },
+
 	/* Ericsson with non-standard id */
 	{ USB_DEVICE(0x0bdb, 0x1002) },