CONFIG_NOT_COHERENT_CACHE is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc

CONFIG_NOT_COHERENT_CACHE (not configurable)

modulename: dma-noncoherent.ko

configname: CONFIG_NOT_COHERENT_CACHE

Linux/PowerPC Kernel Configuration
└─>Processor
└─>NOT_COHERENT_CACHE
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
source code:
arch/powerpc/lib/dma-noncoherent.c