default or selected kernelversion does not have config value CONFIG_PINCTRL_AC5.
Result is shown for kernelversion 6.9.9

CONFIG_PINCTRL_AC5 (not configurable)

modulename: pinctrl-ac5.ko

configname: CONFIG_PINCTRL_AC5

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>PINCTRL_AC5
In linux kernel since version 5.2 (release Date: 2019-07-07)  
source code:
drivers/pinctrl/mvebu/pinctrl-ac5.c

depends
CONFIG_PINCTRL