CONFIG_REALVIEW_EB_A9MP is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Support Multicore Cortex-A9 Tile

configname: CONFIG_REALVIEW_EB_A9MP

Linux Kernel Configuration
└─>ARM Ltd. RealView family
└─>Support Multicore Cortex-A9 Tile
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
Enable support for the Cortex-A9MPCore tile fitted to the
Realview(R) Emulation Baseboard platform.