Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-4.0-20190412' into staging

Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-4.0-20190412' into staging

ppc patch queue for 2018-04-12

Here's a last minute pull request for 4.0.  Turns out my last pull
request, to fix a regression in extended config space access for the
pseries machine didn't fix things hard enough.  This PR has a single
patch which improves the fix to work in more cases.

It's a ghastly, ghastly hack, but it's simple and localized.  I
already have patches almost ready to go in 4.1 that provides a simpler
and cleaner solution to all this.

# gpg: Signature made Fri 12 Apr 2019 06:34:16 BST
# gpg:                using RSA key 75F46586AE61A66CC44E87DC6C38CACA20D9B392
# gpg: Good signature from "David Gibson <[email protected]>" [full]
# gpg:                 aka "David Gibson (Red Hat) <[email protected]>" [full]
# gpg:                 aka "David Gibson (ozlabs.org) <[email protected]>" [full]
# gpg:                 aka "David Gibson (kernel.org) <[email protected]>" [unknown]
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-4.0-20190412:
  spapr_pci: Fix broken naming of PCI bus

Signed-off-by: Peter Maydell <[email protected]>