powerpc: Fix OF parsing of 64 bits PCI addresses

[Segher Boessenkool]

> The OF parsing code for PCI addresses isn't always treating properly
> the address space indication 0b11 (ie. 0x3) as meaning 64 bits
> memory space.
>
> This means that it fails to parse addresses for PCI BARs that have
> this encoding set by the firmware, which happens on some SLOF
> versions and breaks offb palette handling on Powerstation.
>
> Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

Looks good.

Acked-by: Segher Boessenkool <segher at kernel.crashing.org>


Segher