default or selected kernelversion does not have config value CONFIG_ARM_MT8173_CPUFREQ.
Result is shown for kernelversion 6.4.14

Mediatek MT8173 CPUFreq support

modulename: mt8173-cpufreq.ko

configname: CONFIG_ARM_MT8173_CPUFREQ

Linux Kernel Configuration
└─>Mediatek MT8173 CPUFreq support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
This adds the CPUFreq driver support for Mediatek MT8173 SoC.

source code: