Support for tool-off test control of LFNST extension and NSPT
- The two following cfg options are added: LFNSTExt and NSPT.
- Default cfg: LFNSTExt(1), NSPT(1)
- LFNST extension off: LFNSTExt(0), NSPT(1)
- NSPT off: LFNSTExt(1), NSPT(0)
- LFNST extension off + NSPT off: LFNSTExt(0), NSPT(0)