There is a big warning on the linked page that the page is obsolete and
a link to the current version of the Boot Loader Specification. The
Barebox documentation shall directly link to the current version of the
specification.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>