CONFIG_CPU_SUBTYPE_SH7780 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

Support SH7780 processor

modulename: setup-sh7780.ko

and/or

pci-sh7780.ko

configname: CONFIG_CPU_SUBTYPE_SH7780

Linux Kernel Configuration
└─>Processor selection
└─>Support SH7780 processor
In linux kernel since version 2.6.16 (release Date: 2006-03-19)  
source code:
/arch/sh/drivers/pci/

is selected by
CONFIG_SH_HIGHLANDER