This updates the U-Boot which provides the host tools like mkimage to
version 2019.07.
The patches were cleaned up and it was checked if this still compiles
on Linux and FreeBSD.
CONFIG_FIT_SIGNATURE_MAX_SIZE is set to the default value.
The patch for libressl was merged upstream.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This activates support for fit images and some other new mkimage
features. Some of the patches were applied upstream and could be
removed.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
