USB Serial modes

[ajjjjjjjj]

Enables USB Serial mode forced to Telemetry mirror, or debug output in DEBUG builds.

Closes #415

[wimalopaan]

I get this one:

/home/lmeier/Projekte/openix6/opentx.wmgit/radio/src/translations.cpp:436:34: error: 'TR_USB_TELEMETRY' was not declared in this scope; did you mean 'STR_USB_TELEMETRY'?
436 | const char STR_USB_TELEMETRY[] = TR_USB_TELEMETRY;
| ^~~~~~~~~~~~~~~~
| STR_USB_TELEMETRY
make[3]: *** [radio/src/CMakeFiles/firmware.dir/build.make:832: radio/src/CMakeFiles/firmware.dir/translations.cpp.o] Fehler 1

[ajjjjjjjj]

It is only for EN at the moment. I need to add rest of the translations.

[ajjjjjjjj]

@wimalopaan it should compile now without errors.

[wimalopaan]

Oh yes, it does! Thank you.
But it will take some days until I can test it (if needed).
BTW: does the telemetry-mirror also work for ELRS?

[ajjjjjjjj]

Take your time :)
Telemetry mirror works for both - any CRSF/ELRS device and internal AFHDS2A, the same as with AUX Serial.