Enable the DTB loader


Linux Kernel Configuration
└─>Device Drivers
└─>Firmware Drivers
└─>EFI (Extensible Firmware Interface) Support
└─>Enable the DTB loader
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Select this config option to add support for the dtb= command
line parameter, allowing a device tree blob to be loaded into
memory from the EFI System Partition by the stub.

If the device tree is provided by the platform or by
the bootloader this option may not be needed.
But, for various development reasons and to maintain existing
functionality for bootloaders that do not have such support
this option is necessary.