Backport fixes for CVE-2021-27097 and CVE-2021-27138 as well as
a precursor fdt validation fix that allows using the upstream
patches for the CVEs without significant rebasing. Note that
the additional upstream changes to add new U-Boot fit image tests
have been left out to keep the patch count down. Those tests are
currently not used for ptest or oe-selftest, so it is believed
their absence should not be problematic.
Signed-off-by: Scott Murray <scott.murray@konsulko.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>