How to get on DTS file copy to development board?

everyone,I want to transplant a driver,about nand flash(legato don’t have ).
Manufacturers say need to modify the dts files,I have already corrected.but I don’t know how to on the development board.

Need your help.

An actual emergency.

The environment: Legato   AR755X 


As mentioned in this post we don’t currently support device tree as a method of integrating drivers.