CONFIG_MACH_REAL6410 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_REAL6410.
Result is shown for kernelversion 6.9.9

REAL6410

modulename: mach-real6410.ko

configname: CONFIG_MACH_REAL6410

Linux Kernel Configuration
└─>Samsung S3C64XX (deprecated, see help)
└─>REAL6410
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
Machine support for the CoreWind REAL6410