CONFIG_ATARI_KBD_CORE is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

CONFIG_ATARI_KBD_CORE (not configurable)

modulename: atakeyb.ko

configname: CONFIG_ATARI_KBD_CORE

Linux Kernel Configuration
└─>ATARI_KBD_CORE
In linux kernel since version 2.6.22.1 (release Date: 2007-07-10)  
source code:
arch/m68k/atari/atakeyb.c