CONFIG_MACH_SMDK6410 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
SMDK6410
modulename: mach-smdk6410.ko
configname: CONFIG_MACH_SMDK6410
Linux Kernel Configuration
└─>SMDK6410
In linux kernel since version 2.6.29 (release Date: 2009-03-23)
Machine support for the Samsung SMDK6410