CONFIG_CPU_SH4 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

CONFIG_CPU_SH4 (not configurable)

modulename: cache-sh4.ko

and/or

cache-debugfs.ko

and/or

tlb-sh4.ko

configname: CONFIG_CPU_SH4

Linux Kernel Configuration
└─>Processor selection
└─>CPU_SH4
In linux kernel since version 2.6.12  
source code:
arch/sh/mm/cache-sh4.c

is selected by
CONFIG_SH_WDT