CONFIG_CPU_SUBTYPE_SH7604 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh
default or selected kernelversion does not have config value CONFIG_CPU_SUBTYPE_SH7604.
Result is shown for kernelversion 5.4.123
SH7604
configname: CONFIG_CPU_SUBTYPE_SH7604
Processor subtype
└─>SH7604
In linux kernel since version 2.6.12
Select SH7604 if you have SH7604