Fixes #154
[stock / gruvin9x] DSM2=SERIAL was broken since r2725, thanks Cam for
reporting this issue!
Merge branch 'bsongis/TelemetryCorruption-154'
Fixes #155
[Taranis] No more audio freeze!
[Taranis] Best fix for the audio freeze by Mike, thanks!
Merge branch 'bsongis/Taranis_audio_freeze' of https://github.com/opentx/opentx into next
Merge branch 'bsongis/Sky9x_Stick_Gain_Issue_155' of https://github.com/opentx/opentx into next