commit e38c0a1f breaks powerpc boards with uli1575 chip

[Benjamin Herrenschmidt]

On Thu, 2013-12-19 at 08:42 +0400, Nikita Yushchenko wrote:
> No, this does not help.
> 
> I've dumped the actual content of 'range' and 'addr' at the failure
> point 
> (i.e. ar point that returns error with e38c0a1f but passes without 
> e38c0a1f ):
> 
> OF: default map, cp=0, s=10000, da=70
> range:  01 00 00 00 00 00 00 00 00 00 00 00
>  addr:  00 00 00 00 00 00 00 00 00 00 00 70

Something that has a #address-cells larger than 2, or more generally,
an address field that contains more than a single number, must have
a specific translation backend, like we have for PCI.

This is a bit annoying but originates from the original OFW stuff on
which this stuff is based where the bus node would provide the methods
for translation.

Cheers,
Ben.