default or selected kernelversion does not have config value CONFIG_AD2S120X.
Result is shown for kernelversion 5.4.4

Analog Devices ad2s120x driver

modulename: ad2s120x.ko
configname: CONFIG_AD2S120X

Linux Kernel Configuration
└─> Device Drivers
└─> Staging drivers
└─> Industrial I/O support
└─> SPI support
└─> Analog Devices ad2s120x driver

Say yes here to build support for Analog Devices spi resolver
to digital converters, ad2s1200 and ad2s1205, provides direct access
via sysfs.

source code: