default or selected kernelversion does not have config value CONFIG_FW_CS_DSP_KUNIT_TEST_UTILS.
Result is shown for kernelversion 6.6.78

CONFIG_FW_CS_DSP_KUNIT_TEST_UTILS (not configurable)

modulename: cs_dsp_test_utils.ko

configname: CONFIG_FW_CS_DSP_KUNIT_TEST_UTILS

Linux Kernel Configuration
└─>Device Drivers
└─>Firmware Drivers
└─>FW_CS_DSP_KUNIT_TEST_UTILS
In linux kernel since version 6.6.78 (release Date: 2025-02-17)  
source code:
drivers/firmware/cirrus/test/