Additional reasons for the DCC output signal being disabled (#642)
Additional reasons for the DCC output signal being disabled (#642)

* Additional reasons for the DCC output signal being disabled.

* Updates based on some review feedback.

* Add constant definition.

* Changed constants to hex since they are bitmasks.
bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn