CONFIG_CPU_SUBTYPE_SH7785 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

Support SH7785 processor

modulename: setup-sh7785.ko

and/or

pci-sh7780.ko

configname: CONFIG_CPU_SUBTYPE_SH7785

Linux Kernel Configuration
└─>Processor selection
└─>Support SH7785 processor
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  

is selected by
CONFIG_PINCTRL_PFC_SH7785