Add support for Amontec JTAGkey devices to usb/serial

Reference: /n/sources/patch/applied/usbserial-jtagkey
Date: Fri Apr 26 06:53:35 CES 2013
Signed-off-by: sstallion@gmail.com

--- /sys/src/cmd/usb/serial/ftdi.c	Fri Apr 26 06:50:08 2013
+++ /sys/src/cmd/usb/serial/ftdi.c	Fri Apr 26 06:50:04 2013
@@ -201,6 +201,7 @@
 	{ PAPOUCHVid, PAPOUCHTMUDid },
 	{ FTVid, FTACGHFDUALDid },
 	{ FT8U232AMDid, FT4232HDid },
+	{ FTVid, AMONKEYDid },
 	{ 0,	0 },
 };
 
--- /sys/src/cmd/usb/serial/ftdi.h	Fri Apr 26 06:50:13 2013
+++ /sys/src/cmd/usb/serial/ftdi.h	Fri Apr 26 06:50:10 2013
@@ -386,6 +386,10 @@
 	 */
 	FT4232HDid	= 0x6011,		/* FTDI FT4232H based device */
 
+	/*
+	 * Amontec JTAGkey (http://www.amontec.com/)
+	 */
+	AMONKEYDid	= 0xCFF8,
 };
 
 /* Commands */