DM6446 config updates:

 - List two more TAPs, as disabled, mostly for doc purposes
 - Included basic ICEpick support, still disabled by default
 - Shorten line lengths
 - Use $_TARGETNAME to configure the ETM and ETB
 - This ARM core don't support endianness overriding

For now, boards that can't jumper EMU0/EMU1 will need to tweak
a variable's setting.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2265 b42882b7-edfa-0310-969c-e2dbd0fdcd60