default or selected kernelversion does not have config value CONFIG_SND_FSI_HDMI.
Result is shown for kernelversion 6.2.5

FSI-HDMI sound support

modulename: snd-soc-fsi-hdmi.ko

configname: CONFIG_SND_FSI_HDMI

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>SoC Audio support for SuperH
└─>FSI-HDMI sound support
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
This option enables generic sound support for the
FSI - HDMI unit

source code:
sound/soc//sh/