CONFIG_ARCH_SMDK2410 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

SMDK2410/A9M2410

modulename: mach-smdk2410.ko

configname: CONFIG_ARCH_SMDK2410

Linux Kernel Configuration
└─>S3C2410 Machines
└─>SMDK2410/A9M2410
In linux kernel since version 2.6.12  
Say Y here if you are using the SMDK2410 or the derived module A9M2410
<http://www.fsforth.de>

source code:
arch/arm/mach-s3c2410/mach-smdk2410.c