CONFIG_MACH_DA8XX_DT is not available for the selected architecture x86.
Result is shown for architecture arm

Support DA8XX platforms using device tree

modulename: da8xx-dt.ko

configname: CONFIG_MACH_DA8XX_DT

Linux Kernel Configuration
└─>TI DaVinci Implementations
└─>Support DA8XX platforms using device tree
In linux kernel since version 3.1 (release Date: 2011-10-24)
Say y here to include support for TI DaVinci DA850 based using
Flattened Device Tree. More information at <a href="https://www.kernel.org/doc/Documentation/devicetree
">Documentation/devicetree
</a>
source code: