default or selected kernelversion does not have config value CONFIG_PINCTRL_U300.
Result is shown for kernelversion 6.9.9

U300 pin controller driver

modulename: pinctrl-u300.ko

configname: CONFIG_PINCTRL_U300

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>U300 pin controller driver
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/pinctrl/pinctrl-u300.c


is selected by
CONFIG_PINCTRL_COH901

is depended by
CONFIG_ARCH_U300