default or selected kernelversion does not have config value CONFIG_CLK_R9A07G043.
Result is shown for kernelversion 6.9-rc1

RZ/G2UL clock support

modulename: r9a07g043-cpg.ko

configname: CONFIG_CLK_R9A07G043

Linux Kernel Configuration
└─>Device Drivers
└─>Common Clock Framework
└─>RZ/G2UL clock support
In linux kernel since version 5.2 (release Date: 2019-07-07)  
source code: