CONFIG_MACH_REAL6410 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
REAL6410
configname: CONFIG_MACH_REAL6410
Linux Kernel Configuration
└─>Samsung S3C64XX
└─>REAL6410
In linux kernel since version 2.6.36 (release Date: 2010-10-20)
Machine support for the CoreWind REAL6410