add support to SX126X Lora chips.

[Gabriel Huang]

I made a ESP32 Lora board with E22 module, am now trying to program it as a iGate/Digi. Currently it works good with RadioLib. I have very little knowledge regarding APRS, and AX25. your project is the most robust I have ever tried. if you can add SX126X to this project. it can really save me a lot of works.

Thanks!

[Peter Buchegger]

please wait for #183
I have soon time to check the PR.