CONFIG_CPU_PJ4 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_PJ4 (not configurable)

configname: CONFIG_CPU_PJ4

Linux Kernel Configuration
└─>CPU_PJ4
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  

is selected by
CONFIG_CACHE_TAUROS2