default or selected kernelversion does not have config value CONFIG_AB8500_GPIO.
Result is shown for kernelversion 5.6.18
ST-Ericsson AB8500 Mixed Signal Circuit gpio functions
modulename: ab8500-gpio.ko
configname: CONFIG_AB8500_GPIO
Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>ST-Ericsson AB8500 Mixed Signal Circuit gpio functions
In linux kernel since version 2.6.39 (release Date: 2011-05-18)
Select this to enable the AB8500 IC GPIO driver