Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-4.1-20190712' into staging

ppc patch queue for 2019-07-12

First 4.1 hard freeze pull request.  Not much here, just a bug fix for
the XICS interrupt controller and a SLOF firmware update to fix a bug
with IP discovery when there are multiple NICs.

# gpg: Signature made Fri 12 Jul 2019 06:51:24 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-4.1-20190712:
  xics/kvm: Always set the MASKED bit if interrupt is masked
  pseries: Update SLOF firmware image

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