default or selected kernelversion does not have config value CONFIG_OF_DMA_DEFAULT_COHERENT.
Result is shown for kernelversion 6.9.9
CONFIG_OF_DMA_DEFAULT_COHERENT (not configurable)
configname: CONFIG_OF_DMA_DEFAULT_COHERENT
Linux Kernel Configuration
└─>Device Drivers
└─>Device Tree and Open Firmware support
└─>OF_DMA_DEFAULT_COHERENT