[U-Boot] [PATCH 17/53] dtoc: Update Fdt.GetNode() to handle the root node

[sjg at google.com]

This function currently fails if the root node is requested. Requesting
the root node is sometimes useful, so fix the bug.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 tools/dtoc/fdt.py      | 2 ++
 tools/dtoc/test_fdt.py | 5 +++++
 2 files changed, 7 insertions(+)

Applied to u-boot-dm, thanks!