default or selected kernelversion does not have config value CONFIG_K210_SYSCTL.
Result is shown for kernelversion 6.7-rc3

Kendryte K210 system controller

modulename: k210-sysctl.ko

configname: CONFIG_K210_SYSCTL

Linux Kernel Configuration
└─>Device Drivers
└─>SOC (System On Chip) specific Drivers
└─>Kendryte K210 system controller
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Enables controlling the K210 various clocks and to enable
general purpose use of the extra 2MB of SRAM normally
reserved for the AI engine.

source code: