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

STi series syscfg register access based thermal sensors

modulename: st_thermal_syscfg.ko

configname: CONFIG_ST_THERMAL_SYSCFG

Linux Kernel Configuration
└─>Device Drivers
└─>Thermal drivers
└─>Device Tree and Open Firmware support
└─>STMicroelectronics thermal drivers
└─>STi series syscfg register access based thermal sensors
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/thermal/st/st_thermal_syscfg.c