GitLab

A U-Boot image has two CRCs, one to cover the data and that we already
check, and one to cover the header.

Since we're not checking the latter, let's make sure it's the case.
Tested-by: Frank Kunz <mailinglists@kunz-im-inter.net>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>