This is in the BSP customization section of NVIDIA Jetson Linux Driver Package Developer Guide R32.3.1 under Rebuilding DTB
I think that is an error in document. The partition should be kenrel_dtb for tx2 device tree.
Let me correct this in document.
How is the customer informed that the new documentation is available?
How do I know to download a new version of the document?
Is this really accepted if no information about the version of document that was changed.