CONFIG_SH_SDK7786 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

SDK7786

modulename: fixups-sdk7786.ko

configname: CONFIG_SH_SDK7786

Linux Kernel Configuration
└─>Board support
└─>SDK7786
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
Select SDK7786 if configuring for a Renesas Technology Europe
SH7786-65nm board.

source code:
/arch/sh/drivers/pci/fixups-sdk7786.c