Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-4.0-20190409' into staging

ppc patch queue 2019-04-09

This is a small, hard freeze, pull request which fixes a regression on
the pseries machine handling of PCI-E extended config space accesses.

# gpg: Signature made Tue 09 Apr 2019 08:00:36 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-4.0-20190409:
  spapr_pci: Fix extended config space accesses
  pci: Allow PCI bus subtypes to support extended config space accesses

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