CONFIG_EBONY is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc

Ebony

modulename: ebony.ko

and/or

pci_auto.ko

configname: CONFIG_EBONY

Machine Type
└─>Ebony
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option enables support for the IBM PPC440GP evaluation board.

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