CONFIG_SH_SH7757LCR is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

SH7757LCR

modulename: board-sh7757lcr.ko

configname: CONFIG_SH_SH7757LCR

Linux Kernel Configuration
└─>Board support
└─>SH7757LCR
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
source code:
arch/sh/boards/board-sh7757lcr.c