[U-Boot] [PATCH 04/19] fdt: Move header files into lib/libfdt

[sjg at google.com]

These header files are actually part of libfdt. Move them there to make
it easier to build pylibfdt and easier to merge changes from upstream.

Update the license header to use SPDX at the same time.

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

 include/fdt.h       |   68 +-
 include/libfdt.h    | 2094 +------------------------------------------------
 lib/libfdt/fdt.h    |   67 ++
 lib/libfdt/libfdt.h | 2144 +++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 2213 insertions(+), 2160 deletions(-)
 create mode 100644 lib/libfdt/fdt.h
 create mode 100644 lib/libfdt/libfdt.h

Applied to u-boot-fdt/next, thanks!