CONFIG_CPU_SUBTYPE_SH7705 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

SH7705

modulename: setup-sh7705.ko

configname: CONFIG_CPU_SUBTYPE_SH7705

Processor subtype
└─>SH7705
In linux kernel since version 2.6.12  
selects

CONFIG_CPU_SH3

depends
CONFIG_CPU_SH3

is selected by
CONFIG_SH_SOLUTION_ENGINE