Added support for:
- T16 radio
- internal multi-protocol module.
- flashing internal and external multi-protocol modules.
Many thx to:
- goebish, for the hardware support.
- qba667, for the original patches for the internal multi-protocol support (UI and serial com).
* Support new r9m firmwares
* More future proof, thx Kilrah
* (significant) typo
* Companion part
* Make support a compilation option
* Fix compilation for normal users
* Warning popup for usability tests
* Better implementation
* All sizes
* Cosmetics
* Flex is EU+/AU+ only
* [Companion] Handle "flexr9m" option in module settings UI (to match radio UI, including warning msg); Move some "toString" functions out of ModelPrinter into ModuleData/Multiprotocols; "Future-proof" available R9M power options based on "stdr9m" fw option; Fix missing "Hitec" MM protocol name; Fix printing of R9M-EU power level in ModelPrinter.
* Cosmetics
* Rename R9M flex option
* Move failsafe further back to prevent nav oddity
* POC for X9, requires -DBINDING_OPTIONS=YES
* There are apparently 4 valid choices
* - make BINDING_OPTIONS part of standard code
- adapt R9M EU LBT dialog to choice on bind
* - remove option from Companion
- cosmetics
* Compilation fixes
* Rename EXT option to TELEMETRY
* Change test accordingly
* Rename FRSKY to TELEMETRY_FRSKY
* Rename ARDUPILOT to TELEMETRY_ARDUPILOT
* More renames (JETI, MAVLINK, NMEA)
* Fixes to make commit-test happy
* Further tests added to commit-test
* Cleanup
* Rename EXTSTD to TELEMETRY_NONE
* Allow software based volume control
- enable it for AR9X
- rename "HARDWARE_VOLUME" defines to "MASTER_VOLUME"
- adjust build-firmware.py and fwoptions.py
* Software based volume control: Do it right
* whitespace cleanup
* software volume: cleanup/revert some leftovers of undone changes
