CONFIG_CACHE_FEROCEON_L2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Enable the Feroceon L2 cache controller

modulename: cache-feroceon-l2.ko

configname: CONFIG_CACHE_FEROCEON_L2

Linux Kernel Configuration
└─>Enable the Feroceon L2 cache controller
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This option enables the Feroceon L2 cache controller.

source code:
arch/arm/mm/cache-feroceon-l2.c