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

SoC Audio support for Marvell Saarb

modulename: snd-soc-saarb.ko

configname: CONFIG_SND_SOC_SAARB

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>SoC Audio support for Marvell Saarb
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
Say Y if you want to add support for SoC audio on the
Marvell Saarb reference platform.

source code:
sound/soc//pxa/