drivers/foc: return scaling factor for phase currents and BEMF via ioctl #11176
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Summary
These values are board-specific properties that must be known on the application side.
Until now, these values had to be hardcoded on the application side.
Impact
we can get rid of the hardcoded ADC scaling values on the app side.
This is also the first step to support configurable phase currents gain.
Testing
odriver3.6 board (not yet upstream)