Moved ADC to configuration stored in masterConfig.
- can remove features for vbat etc in future (perhaps param groups)
- allows adc to be turned off completely (freeing up dma)
Added feature SDCARD
- enables it to be turned off.
- allows for DMA to be turned off (set sdcard_dma=OFF)
Fixed hardware revision to allow BJF4 mini to use the same target (no need for an additional target).