Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.5-20151204' into staging

Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.5-20151204' into staging

ppc patch queue for 2.5 2015-12-04

This contains some last minute QOM behaviour fixes from Markus
Armbruster.

# gpg: Signature made Fri 04 Dec 2015 06:43:54 GMT using RSA key ID 20D9B392
# gpg: Good signature from "David Gibson <[email protected]>"
# gpg:                 aka "David Gibson (Red Hat) <[email protected]>"
# gpg:                 aka "David Gibson (ozlabs.org) <[email protected]>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.5-20151204:
  spapr_drc: Change value of property "fdt" from null back to {}
  spapr_drc: Make device "spapr-dr-connector" unavailable with -device
  spapr_drc: Handle visitor errors properly

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