CONFIG_SH_CMT is not available for thedefaultarchitecture x86.
Result is shown for architecture sh
default or selected kernelversion does not have config value CONFIG_SH_CMT.
Result is shown for kernelversion 5.3.7

CMT timer support

modulename: timer-cmt.ko

configname: CONFIG_SH_CMT

Linux/SuperH Kernel Configuration
└─>System type
└─>Timer and clock configuration
└─>CMT timer support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This enables the use of the CMT as the system timer.

source code: