default or selected kernelversion does not have config value CONFIG_SYSC_R9A08G045.
Result is shown for kernelversion 6.6.86

Renesas RZ/G3S System controller support

modulename: r9a08g045-sysc.ko

configname: CONFIG_SYSC_R9A08G045

Linux Kernel Configuration
└─>Device Drivers
└─>SOC (System On Chip) specific Drivers
└─>Renesas SoC driver support
└─>Renesas RZ/G3S System controller support
In linux kernel since version 6.6.86 (release Date: 2025-04-07)  
source code:
drivers/soc/renesas/r9a08g045-sysc.c
selects
CONFIG_SYSC_RZ


is depended by
CONFIG_ARCH_R9A08G045