[RFC/PATCH] Set up PCI tree from OF on ppc64

[Paul Mackerras]

Segher Boessenkool writes:

> Then the hypervisor should just hide these bridges from us (or fake
> all accesses to it).

What the hypervisor "should" do is pretty close to irrelevant in this
situation.  I basically had the choice of either presenting each of
these special PCI-PCI bridges as a host bridge to the PCI-PCI code, or
constructing the PCI tree from the OF device tree, and the latter
seemed better to me.

Paul.