default or selected kernelversion does not have config value CONFIG_ANDROID_SWITCH_GPIO.
Result is shown for kernelversion 5.3.7
Android GPIO Switch support
modulename: switch_gpio.ko
configname: CONFIG_ANDROID_SWITCH_GPIO
Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Android
└─>Android Switch class support
└─>Android GPIO Switch support
In linux kernel since version 3.3 (release Date: 2012-03-18)
Say Y here to enable GPIO based switch support.