CONFIG_ARC_BUILTIN_DTB_NAME is not available for thedefaultarchitecture x86.
Result is shown for architecture arc

Built in DTB


Linux Kernel Configuration
└─>ARC Architecture Configuration
└─>Built in DTB
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Set the name of the DTB to embed in the vmlinux binary
Leaving it blank selects the minimal "skeleton" dtb