CONFIG_ARCH_EBSA285_ADDIN is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

EBSA285 (addin mode)

configname: CONFIG_ARCH_EBSA285_ADDIN

Linux Kernel Configuration
└─>Footbridge Implementations
└─>EBSA285 (addin mode)
In linux kernel since version 2.6.12  
Say Y here if you intend to run this kernel on the EBSA285 card
in addin mode.

Saying N will reduce the size of the Footbridge kernel.