default or selected kernelversion does not have config value CONFIG_ARCH_R8A7796.
Result is shown for kernelversion 6.8.2

Renesas R-Car M3-W SoC Platform

configname: CONFIG_ARCH_R8A7796

Linux Kernel Configuration
└─>Device Drivers
└─>SOC (System On Chip) specific Drivers
└─>Renesas R-Car M3-W SoC Platform
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This enables support for the Renesas R-Car M3-W SoC.