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

SoC Audio support for SiRF internal audio codec

modulename: snd-soc-sirf-audio.ko

configname: CONFIG_SND_SOC_SIRF_AUDIO

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>SoC Audio support for SiRF internal audio codec
In linux kernel since version 3.15 (release Date: 2014-06-08)  
source code:
sound/soc//sirf/