Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-4.1-20190728' into staging

ppc patch queue (for 4.1) 2019-07-28

Here's a pull request for qemu-4.1, which I hope will be the last from
the ppc tree.  This applies a couple of last minute fixes for the XIVE
code.

# gpg: Signature made Sun 28 Jul 2019 07:42:11 BST
# gpg:                using RSA key 75F46586AE61A66CC44E87DC6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>" [full]
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>" [full]
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>" [full]
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>" [unknown]
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-4.1-20190728:
  xics/kvm: Fix fallback to emulated XICS
  spapr/irq: Inform the user when falling back to emulated IC

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>