default or selected kernelversion does not have config value CONFIG_ARCH_R8A78000.
Result is shown for kernelversion 6.18-rc3
ARM64 Platform support for R8A78000 (R-Car X5H)
configname: CONFIG_ARCH_R8A78000
Linux Kernel Configuration
└─>Device Drivers
└─>SOC (System On Chip) specific Drivers
└─>Renesas SoC driver support
└─>ARM64 Platform support for R8A78000 (R-Car X5H)
This enables support for the Renesas R-Car X5H SoC.