CONFIG_PINCTRL_MTK (not configurable)

modulename: pinctrl-mtk-common.ko

configname: CONFIG_PINCTRL_MTK

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>Device Tree and Open Firmware support
└─>PINCTRL_MTK
In linux kernel since version 3.10 (release Date: 2013-06-30)  

depends
CONFIG_OF
CONFIG_PINCTRL
CONFIG_ARCH_MEDIATEK or CONFIG_COMPILE_TEST

is selected by
CONFIG_EINT_MTK