[U-Boot] mkimage needs fitImage

[shr ch]

Hi,

For adding public keys to uboot dtb the mkimage step is

mkimage -D "-I dts -O dtb -p 2000" -F -k keys -K u-boot.dtb -r fitImage

It resigns fitImage and adds public key to uboot dtb

but why do we need fitImage for adding public keys to uboot dtb ? can't
this be two different steps ? there is already a step to just build
fitImage.

This creates unnecessary dependency of building fitImage before building
uboot.