CONFIG_EP405PC is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc
default or selected kernelversion does not have config value CONFIG_EP405PC.
Result is shown for kernelversion 5.19-rc1

EP405PC Support

configname: CONFIG_EP405PC

Linux Kernel Configuration
└─>IBM 4xx options
└─>EP405PC Support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)