ports/nrf/modules/music: Removing initialization of softpwm and ticker upon music module load. Updating microbit_music_init0 to register low priority ticker callback for the music module.
ports/nrf/modules/music: Removing initialization of softpwm and ticker upon music module load. Updating microbit_music_init0 to register low priority ticker callback for the music module.

tralamazza/micropython,tralamazza/micropython,tralamazza/micropython,tralamazza/micropython