U-Boot provides standard variables for load addresses, and
filesystem-agnostic load-commands. Furthermore thanks to distro-boot,
the device and partition from which the system boots is known.
The new boot-script makes use of all this information.
Tested on the only board that uses this boot-script: Clearfog Pro
Signed-off-by: Josua Mayer <josua.mayer97@gmail.com>
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