CONFIG_CPU_CACHE_V6 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_CACHE_V6 (not configurable)

modulename: cache-v6.ko

configname: CONFIG_CPU_CACHE_V6

Linux Kernel Configuration
└─>CPU_CACHE_V6
In linux kernel since version 2.6.12  
source code:
/arch/arm/mm/