CONFIG_SH_JCORE_SOC is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

J-Core SoC

configname: CONFIG_SH_JCORE_SOC

Linux Kernel Configuration
└─>Board support
└─>J-Core SoC
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Select this option to include drivers core components of the
J-Core SoC, including interrupt controllers and timers.