Add support for the Amontec JTAGkey2

Add support for the Amontec JTAGkey2, see
http://www.amontec.com/jtagkey2.shtml
http://www.amontec.com/jtagkey.shtml.

This FTDI 2232H variant has an additional output enable, which will be
set to its "on" (L) when CS is pulled low. But it lacks a power supply
and you need an external 3.3V source.

The attached patch adds "jtagkey" as "type" parameter for ft2232_spi. It
should work with all JTAGkeys (JTAGkey, JTAGkey-tiny and JTAGkey2) but I
only have a JTAGkey2 here for testing.

Add all FT2232H/FT4232H based programmers to the list printed with
flashrom -L

Corresponding to flashrom svn r1119.

Signed-off-by: Jörg Fischer <turboj@gmx.de>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/flashrom.8 b/flashrom.8
index 2ee22b5..aab2d02 100644
--- a/flashrom.8
+++ b/flashrom.8
@@ -177,11 +177,11 @@
 .sp
 .BR "* atahpt" " (for flash ROMs on Highpoint ATA/RAID controllers)"
 .sp
-.BR "* it87spi" " (for flash ROMs behind an ITE IT87xx Super I/O LPC/SPI\
+.BR "* it87spi" " (for flash ROMs behind an ITE IT87xx Super I/O LPC/SPI \
 translation unit)"
 .sp
-.BR "* ft2232_spi" " (for SPI flash ROMs attached to a FT2232H/FT4232H based\
-USB SPI programmer)"
+.BR "* ft2232_spi" " (for SPI flash ROMs attached to a FT2232H/FT4232H/JTAGkey \
+based USB SPI programmer)"
 .sp
 .BR "* serprog" " (for flash ROMs attached to a programmer speaking serprog)"
 .sp
@@ -351,7 +351,7 @@
 syntax where
 .B model
 can be any of
-.BR 2232H ", or " 4232H
+.BR 2232H ", "JTAGkey ", or " 4232H
 and
 .B interface
 can be any of