CONFIG_CACHE_XSC3L2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Enable the L2 cache on XScale3

modulename: cache-xsc3l2.ko

configname: CONFIG_CACHE_XSC3L2

Linux Kernel Configuration
└─>Enable the L2 cache on XScale3
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This option enables the L2 cache on XScale3.

source code: