Add USB Device Obihai OBiWiFi with 3823:6249

USB driver gets attached and Wi-Fi adapter is usable. However, I did not test this driver but used version 5.3.4 for RTL8811AU, see <github.com/astsam/rtl8812au/issues/51#issuecomment-415834718> and <github.com/aircrack-ng/rtl8812au/pull/255>.

os_dep/linux/usb_intf.c

@@ -302,6 +302,7 @@ static struct usb_device_id rtw_usb_id_tbl[] ={
 	{USB_DEVICE(0x04BB, 0x0953),.driver_info = RTL8821}, /* I-O DATA - WN-AC433UA */
 	{USB_DEVICE(0x0BDA, 0xA811),.driver_info = RTL8821}, /* GMYLE - AC450 */
 	{USB_DEVICE(0x2001, 0x3318),.driver_info = RTL8821}, /* D-Link - DWA-172 */
+	{USB_DEVICE(0x3823, 0x6249),.driver_info = RTL8821}, /* Obihai - OBiWiFi */
 #endif
 
 #ifdef CONFIG_RTL8192E