default or selected kernelversion does not have config value CONFIG_CXL_AFU_DRIVER_OPS.
Result is shown for kernelversion 6.9.9

CONFIG_CXL_AFU_DRIVER_OPS (not configurable)

configname: CONFIG_CXL_AFU_DRIVER_OPS

Linux Kernel Configuration
└─>Device Drivers
└─>Misc devices
└─>CXL_AFU_DRIVER_OPS
In linux kernel since version 4.1 (release Date: 2015-06-21)