CONFIG_HAVE_CACHE_SPLIT is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

CONFIG_HAVE_CACHE_SPLIT (not configurable)

configname: CONFIG_HAVE_CACHE_SPLIT

Linux Kernel Configuration
└─>HAVE_CACHE_SPLIT
In linux kernel since version 2.6.38 (release Date: 2011-03-14)