`ADCx` defines. The processor series (F/G/H) isn't enough.
With reference to the definitions of `ADCx_BASE` in the
`CMSIS/Device/ST/*/.h files`
* H7A3 has ADC1/2 but not 3/4/5.
* H750 has ADC1/2/3 not but 4/5.
* G471 has ADC1/2 but not 3/4/5.
* G473 has ADC1/2/3/4/5.
* F7 has ADC1/2/3 but not 4/5.
* F4 has ADC1/2/3 but not 4/5.
* F3 has ADC1/2/3/4 but not 5.
* F1 has ADC1/2/3 but not 4/5.
Somewhere along the way Betaflight changed the voltage units is uses for voltages from 0.1v to 0.01v
This update corrects the documentation of `vbat_max_cell_voltage`, `vbat_min_cell_voltage`, `vbat_warning_cell_voltage` to reflect that.
broken by the fix for #10220.
Smart Audio will now default to the old (bad) behavior where pulldowns
are being used instead of pullups for most BF supported processors when
in Bidirectional, PushPull mode.
Updated the OSD element and stats rendering code to use this fuction to print floating point values of varying precisions.
Will make adding OSD element variants that provide different decimal precisions (like voltage, amperage, etc.) easy to implement since all that needs to change is the `decimalPlaces` passed to the function. As an example, see the `osdFormatAltitudeString()` function.
If at some later date a more capable `printf` package is inplemented, then the guts of the `osdPrintFloat()` function could just be simplified while leaving the abstraction in place.
Variant 1 (default): Altitude displays with one decimal place. No change in behavior.
Variant 2: Altitude displays as whole number (no decimal) so it will represent meters or feet depending on the units selected.
Provides a properly implemented way for MSP query type OSD implementations (like DJI) to display OSD warnings. Separates the warnings generation from the OSD task and shares common code to make the text available for the OSD and/or via MSP. Eliminates the need to implement hacks and workarounds like using the `CRAFT_NAME` field to display warnings. Since the warnings logic is now separate, the OSD task does not need to be running unlike other hacks.
Adds the `MSP2_GET_OSD_WARNINGS` message formatted as follows:
```
byte description
0 Display attributes including blink (see displayPortAttr_e in drivers/display.h)
1 Length of warning text
2-n Warning text characters
```
