CONFIG_CPU_SH3 is not available for the selected architecture x86.
Result is shown for architecture sh

SH-3

modulename: tlb-sh3.ko

and/or

cache-sh3.ko

configname: CONFIG_CPU_SH3

Processor family
└─>SH-3
In linux kernel since version 2.6.12 )
source code:
arch/sh/mm/cache-sh3.c
selects
CONFIG_CPU_HAS_INTEVT
CONFIG_CPU_HAS_SR_RB
CONFIG_SH_INTC
CONFIG_SYS_SUPPORTS_SH_TMU