Summary:
The Freescale PCIe Root Complex shows up as a Processor class device, PowerPC
subclass, so the generic PCI code ignores it for a bridge. This adds support
for it.
As part of this, update the Freescale PCI hostbridge driver, to allow probing
beyond the root complex, instead of only allowing "proper" PCI-PCI bridges.
Reviewers: #powerpc, marcel, nwhitehorn
Reviewed By: nwhitehorn
Subscribers: imp
Differential Revision: https://reviews.freebsd.org/D2442
Relnotes: yes