default or selected kernelversion does not have config value CONFIG_SND_AD1848_LIB.
Result is shown for kernelversion 5.3.7

CONFIG_SND_AD1848_LIB (not configurable)

modulename: snd-ad1848-lib.ko

configname: CONFIG_SND_AD1848_LIB

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>SND_AD1848_LIB
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
source code: