Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-5.0-20200407' into staging

Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-5.0-20200407' into staging

ppc patch queue 2020-04-07

An assortment of fixes for qemu-5.0, including a number for the FWNMI
feature which is new this release.

# gpg: Signature made Tue 07 Apr 2020 05:35:10 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-5.0-20200407:
  ppc/pnv: Create BMC devices only when defaults are enabled
  pseries: Update SLOF firmware image
  hw/ppc/ppc440_uc.c: Remove incorrect iothread locking from dcr_write_pcie()
  spapr: Fix failure path for attempting to hot unplug PCI bridges
  ppc/spapr: Don't kill the guest if a recovered FWNMI machine check delivery fails
  ppc/spapr: Add FWNMI machine check delivery warnings
  ppc/spapr: Improve FWNMI machine check delivery corner case comments
  ppc/spapr: KVM FWNMI should not be enabled until guest requests it
  vfio/spapr: Fix page size calculation
  hw/ppc/e500.c: Handle qemu_find_file() failure

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