default or selected kernelversion does not have config value CONFIG_SND_SOC_SAMPLE_PSC_AC97.
Result is shown for kernelversion 5.4.194

Sample Au12x0/Au1550 PSC AC97 sound machine

modulename: snd-soc-sample-ac97.ko

configname: CONFIG_SND_SOC_SAMPLE_PSC_AC97

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>Sample Au12x0/Au1550 PSC AC97 sound machine
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This is a sample AC97 sound machine for use in Au12x0/Au1550
based systems which have audio on PSC1 (e.g. Db1200 demoboard).

source code:
sound/soc//au1x/