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

CONFIG_STI_RESET_SYSCFG (not configurable)

modulename: reset-syscfg.ko

configname: CONFIG_STI_RESET_SYSCFG

Linux Kernel Configuration
└─>Device Drivers
└─>Reset Controller Support
└─>STI_RESET_SYSCFG
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/reset/sti/reset-syscfg.c

is depended by
CONFIG_STIH407_RESET