CONFIG_ARCH_AUTCPU12 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_AUTCPU12.
Result is shown for kernelversion 6.5.1

AUTCPU12

modulename: board-autcpu12.ko

configname: CONFIG_ARCH_AUTCPU12

Linux Kernel Configuration
└─>CLPS711X/EP721X/EP731X Implementations
└─>AUTCPU12
In linux kernel since version 2.6.12  
Say Y if you intend to run the kernel on the autronix autcpu12
board. This board is based on a Cirrus Logic CS89712.

source code: