Baytrail (legacy) Platforms

modulename: snd-soc-sst-baytrail-pcm.ko

configname: CONFIG_SND_SOC_INTEL_BAYTRAIL

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>Baytrail (legacy) Platforms
In linux kernel since version 3.10 (release Date: 2013-06-30)  
If you have a Intel Baytrail platform connected to an I2S codec,
then enable this option by saying Y or m. This was typically used
for Baytrail Chromebooks but this option is now deprecated and is
not recommended, use SND_SST_ATOM_HIFI2_PLATFORM instead.

source code:
sound/soc//intel/baytrail/