CONFIG_CPCI405 is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc
default or selected kernelversion does not have config value CONFIG_CPCI405.
Result is shown for kernelversion 5.19-rc1

CPCI405

modulename: cpci405.ko

configname: CONFIG_CPCI405

Machine Type
└─>CPCI405
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option enables support for the CPCI405 board.

source code:
arch/ppc/platforms/4xx/cpci405.c