Add support for Propel protocol

[TheRealMoeder]

Working in MPM:
https://github.com/pascallanger/DIY-Multiprotocol-TX-Module/blob/master/Multiprotocol/Propel_nrf24l01.ino

Already preliminary work by @hexfet available, probably just some minor changes needed:
https://github.com/hexfet/deviation/tree/proto_propel

[pascallanger]

Minor changes include:

• bind phase completion
• any ID and hoping freq
• flags for the different features
• telemetry for model status
• ...
  Only works with genuine nrf24l01. Some of the mpm modules do not have a genuine component like all the Jumper to date. I've tried to emulate it with another component but it didn't work due to the short timing...
  Pascal

[TheRealMoeder]

thanks for the heads up ;)