CONFIG_CPU_SUBTYPE_SH7707 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

SH7707

modulename: setup-sh770x.ko

configname: CONFIG_CPU_SUBTYPE_SH7707

Processor subtype
└─>SH7707
In linux kernel since version 2.6.12  
Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.