This reverts commit 8cca0beba9. The PWM input using the RPI DMA is causing trouble with RPI boards using PPMSUM. Let's revert it until the solution is found. We still leave the ifdef in RCInput for BH hat.
8cca0beba9
Support 8 PWM channels as RCInput.
Override the init() method from parent class that doesn't have a parameter since it's not used here.