CONFIG_SH_RSK7264 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

RSK2+SH7264

modulename: devices-rsk7264.ko

configname: CONFIG_SH_RSK7264

RSK+ options
└─>RSK2+SH7264
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
arch/sh/boards/mach-rsk/devices-rsk7264.c