[U-Boot] U-Boot PXA support

[Alex Sadovsky]

> - HP iPAQ Pocket PC h2200
>
> A consumer device with PXA255 from back in 2002. There has not been any
> activity on h2200 from its maintainer Lukasz Dalek for almost 5 years
> now. Without anybody actually owning such hardware stepping up it will
> be quite impossible to maintain.

I still have one (and a box of similar ones). PDAs are good as cheap
ARM SBC for different kind of educational purposes. Though I have to
accept that such reason isn't big enough for mainline support.

Cheers,
Alex