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

NCP

configname: CONFIG_MACH_NCP

Linux Kernel Configuration
└─>Samsung S3C64XX (deprecated, see help)
└─>NCP
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
Machine support for the Samsung NCP