CONFIG_AKEBONO is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
IBM Akebono (476gtr) Support
modulename: ppc476.ko
configname: CONFIG_AKEBONO
Linux Kernel Configuration
└─>IBM Akebono (476gtr) Support
In linux kernel since version 3.10 (release Date: 2013-06-30)
This option enables support for the IBM Akebono (476gtr) evaluation board