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

CONFIG_MFD_TMIO (not configurable)

configname: CONFIG_MFD_TMIO

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>MFD_TMIO
In linux kernel since version 2.6.27 (release Date: 2008-10-09)