robert-hh ed1f42cb49 nrf/modules/machine/pwm: Support using all 4 channels of a PWM module.
These have the same frequency, but can have different duty cycle and
polarity.

pwm.deinit() stops all channels of a module, but does not release the
module.  pwm.init() without arguments restarts all outputs.
2023-03-10 10:44:02 +11:00
..