CONFIG_CPU_SUBTYPE_SH7343 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

Support SH7343 processor

modulename: setup-sh7343.ko

configname: CONFIG_CPU_SUBTYPE_SH7343

Linux Kernel Configuration
└─>Processor selection
└─>Support SH7343 processor
In linux kernel since version 2.6.19 (release Date: 2006-11-29)  
source code:
arch/sh/kernel/cpu//sh4a/setup-sh7343.c