default or selected kernelversion does not have config value CONFIG_SND_SOC_NUC900.
Result is shown for kernelversion 6.9.9

SoC Audio for NUC900 series

modulename: snd-soc-nuc900-pcm.ko

configname: CONFIG_SND_SOC_NUC900

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>SoC Audio for NUC900 series
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
This option enables support for AC97 mode on the NUC900 SoC.

source code: