[Tetrapol-kit] Add a "tetrapol_dump" option

Hi,

I'd like to know if it would be possible to add an option for tetrapol_dump.

Currently it has :

Usage: ./tetrapol_dump [OPTIONS ...] -i <PATH> input file with demodulated bits -b { UHF | VHF } radio band (default is UHF -t { CCH | TCH } select betwen control and traffic channel -d { DOWN | UP } direction, downlink/direct or uplink

Would it possible to add an option to sort between "DATA" "VOICE"....

It would be like that : -x {DATA | VOICE | ALL} ... It would allow to sort the output.

Thank you for your work !

Kevin.