The pull-ups required if you need to connect to your board with the JTAG-Emulator.
If not, than you can connect to a fixed level.
nTRST on the ADuC706x has a GPIO functionality I tested as input only.
TDO may work as well as GPIOs input on P2.3 - but bioth not tested and specified.
If you try, be carefull - you may block the access to the part!