default or selected kernelversion does not have config value CONFIG_SND_BF6XX_SOC_I2S.
Result is shown for kernelversion 6.7-rc3

CONFIG_SND_BF6XX_SOC_I2S (not configurable)

modulename: snd-soc-bf6xx-i2s.ko

configname: CONFIG_SND_BF6XX_SOC_I2S

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>SND_BF6XX_SOC_I2S
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
sound/soc//blackfin/