CONFIG_MIPS_CPU_SCACHE is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_MIPS_CPU_SCACHE (not configurable)

modulename: sc-mips.ko

configname: CONFIG_MIPS_CPU_SCACHE

Linux Kernel Configuration
└─>Kernel type
└─>MIPS_CPU_SCACHE
In linux kernel since version 2.6.18 (release Date: 2006-09-19)  
source code:
arch/mips/mm/sc-mips.c

is depended by
CONFIG_CPU_BMIPS5000