USB: ftdi_sio: add NovaTech OrionLXm product ID

The NovaTech OrionLXm uses an onboard FTDI serial converter for JTAG and
console access.

Here is the lsusb output:
Bus 004 Device 123: ID 0403:7c90 Future Technology Devices
International, Ltd

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index 993c93d..500474c 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -538,6 +538,11 @@
  */
 #define FTDI_TIAO_UMPA_PID	0x8a98	/* TIAO/DIYGADGET USB Multi-Protocol Adapter */
 
+/*
+ * NovaTech product ids (FTDI_VID)
+ */
+#define FTDI_NT_ORIONLXM_PID	0x7c90	/* OrionLXm Substation Automation Platform */
+
 
 /********************************/
 /** third-party VID/PID combos **/