[U-Boot] this page of wiki is lack of a cmd

[IaMaPlAyEr]

Hi,

this page of wiki is lack of a cmd.

http://www.denx.de/wiki/view/DULG/UBootCmdGroupExec

can be converted into a U-Boot script image using the mkimage command like this:
???????
Now you can load and execute this script image in U-Boot:

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Sincerely,

HaveF