Handle the case where the full fitImage support is enabled. In this
case, the whole fitImage must be loaded up front as some parts of the
fitImage code require memory-mapped access to the entire fitImage.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>