default or selected kernelversion does not have config value CONFIG_GPIO_POLARFIRE_SOC.
Result is shown for kernelversion 6.6.75
Microchip FPGA GPIO support
modulename: gpio-mpfs.ko
configname: CONFIG_GPIO_POLARFIRE_SOC
Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>Microchip FPGA GPIO support
In linux kernel since version 6.13 (release Date: 2025-01-19)
Say yes here to support the GPIO controllers on Microchip FPGAs.