TKR_Thresh: TKR threshold register settings

• Registers:
  

  Group	Register Name	Instances	Multiplicity	Subsections	Type	Width (bits)
  TDC	tfe_dac.threshold	16 x 36 x 24	1	1	int	7

  
  Note that tfe_dac.threshold is actually the ``threshold'' field in the tfe_dac register.
• Methods:
  BCAST uses a single setting of all registers.
  SETTINGS uses an ancillary file to set all the registers.
• Ancillary files:
  TKR_ThresholdSettings.
• Constants: None.