[PATCH] USB: ftdi_sio vendor code for RR-CirKits LocoBuffer USB

This patch adds recognition of the RR-CirKits LocoBuffer USB
to the existing FTDI driver.  http://www.rr-cirkits.com

Signed-off-by: Nathan Bronson <ngb@sns-usa.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/ftdi_sio.h b/drivers/usb/serial/ftdi_sio.h
index 2155f0e..b6c50a1 100644
--- a/drivers/usb/serial/ftdi_sio.h
+++ b/drivers/usb/serial/ftdi_sio.h
@@ -400,6 +400,11 @@
 #define FTDI_WESTREX_MODEL_8900F_PID	0xDC01	/* Model 8900F */
 
 /*
+ * RR-CirKits LocoBuffer USB (http://www.rr-cirkits.com)
+ */
+#define FTDI_RRCIRKITS_LOCOBUFFER_PID	0xc7d0	/* LocoBuffer USB */
+
+/*
  * Eclo (http://www.eclo.pt/) product IDs.
  * PID 0xEA90 submitted by Martin Grill.
  */