CONFIG_MACH_NURI is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Mobile NURI Board

modulename: mach-nuri.ko

configname: CONFIG_MACH_NURI

Linux Kernel Configuration
└─>EXYNOS4 Machines
└─>Mobile NURI Board
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Machine support for Samsung Mobile NURI Board.

source code:
arch/arm/mach-exynos4/mach-nuri.c