[U-Boot] [PATCH RFC] imx: add multi-architecture README

[Wolfgang Denk]

Dear Eric Nelson,

In message <527E99CB.7030804 at boundarydevices.com> you wrote:
> 
> As I mentioned yesterday, I'd like to get some agreement about some
> of the fundamentals of how we'll do multi-arch, since they have an
> impact on some patches in flight, notably

We should be really precise when using terms like "architecture".
Multi-arch would actually mean that one U-Boot image was capable of
running on - say - both ARM and MIPS processors.

We are not in a shape to even be able to run on all boards of a single
processor family within the same architecture.  Even if others use
Big Words for their marketing documents, we should stick to plain
technical facts and use appropriate names.

Best regards,

Wolfgang Denk

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