default or selected kernelversion does not have config value CONFIG_AB8500_PWM.
Result is shown for kernelversion 5.6.17

AB8500 PWM support

modulename: ab8500-pwm.ko
configname: CONFIG_AB8500_PWM

Linux Kernel Configuration
└─> Device Drivers
└─> Misc devices
└─> AB8500 PWM support

This driver exports functions to enable/disble/config/free Pulse
Width Modulation in the Analog Baseband Chip AB8500.
It is used by led and backlight driver to control the intensity.

source code: