CONFIG_405EP is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_405EP.
Result is shown for kernelversion 6.2.5

CONFIG_405EP (not configurable)

configname: CONFIG_405EP

Linux Kernel Configuration
└─>405EP
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
is depended by
CONFIG_HOTFOOT