[PATCH] cmd: pxe: add alias devicetree-overlay for fdtoverlays

[Edoardo Tomelleri]

Hello Neil,

> Concerning the alias name, can you specify in the patch the link to the
> Boot Loader Specification ? And probably update the PXE doc but reusing
> the same wording.
I'm not sure I understand what you mean about the PXE doc, is it better if the
devicetree and devicetree-overlay keywords have the same description as
fdt and fdtoverlays instead of just a reference, or you are you referring to the
what I've added to distro.rst, like examples? The PXE doc already mentions
required environment variables, so there is not much left to add.
Thanks,
Edoardo