In order to be able to consume system firmware (SYSFW) as well as the
associated configuration data from the boot media introduce a framework
that allows building the SYSFW image itself as well as the different
domain-specific configuration fragments (board, pm, rm, and sec) into an
image tree blob (ITB) file called sysfw.itb.
To establish a known-good starting point for development and testing use
U-Boot commit 7501705610 ("arm: K3: am654: Update board config for
v2018.07a enforcement in 2018.08 release of sysfw") as a baseline for the
AM654x board configuration data. Furthermore integrate SYSFW v2018.08b as
released on 09/12/2018 by way of download URL.
See included README.md for a more complete description.
Signed-off-by: Andreas Dannenberg <firstname.lastname@example.org>