CONFIG_MACH_S3C2416_DT is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Samsung S3C2416 machine using devicetree

modulename: mach-s3c2416-dt.ko

configname: CONFIG_MACH_S3C2416_DT

Linux Kernel Configuration
└─>SAMSUNG S3C24XX SoCs Support
└─>Samsung S3C2416 machine using devicetree
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Machine support for Samsung S3C2416 machines with device tree enabled.
Select this if a fdt blob is available for the S3C2416 SoC based board.
Note: This is under development and not all peripherals can be supported
with this machine file.

source code: