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

MIPS CMP framework support

modulename: smp-cmp.ko

configname: CONFIG_MIPS_CMP

Linux Kernel Configuration
└─>Kernel type
└─>MIPS CMP framework support
In linux kernel since version 2.6.26 (release Date: 2008-07-13)  
This is a placeholder option for the GCMP work. It will need to
be handled differently...

source code:
arch/mips/kernel/smp-cmp.c