This class no longer exists, it has been merged with images_types.
https://jira.digi.com/browse/DEL-5518
Signed-off-by: Jose Diaz de Grenu <Jose.DiazdeGrenu@digi.com>
The u-boot header is required for U-Boot to boot the image in secure boot.
The cpio.gz.u-boot.tf image gets signed and encrpyted if required.
https://jira.digi.com/browse/DEL-3242
Signed-off-by: Diaz de Grenu, Jose <Jose.DiazdeGrenu@digi.com>