Merge remote-tracking branch 'remotes/afaerber/tags/qom-devices-for-peter' into staging

QOM infrastructure fixes and device conversions

* Cleanups for recursive device unrealization

# gpg: Signature made Thu 04 Sep 2014 18:17:35 BST using RSA key ID 3E7E013F
# gpg: Good signature from "Andreas Färber <afaerber@suse.de>"
# gpg:                 aka "Andreas Färber <afaerber@suse.com>"

* remotes/afaerber/tags/qom-devices-for-peter:
  qdev: Add cleanup logic in device_set_realized() to avoid resource leak
  qdev: Use NULL instead of local_err for qbus_child unrealize
  qdev: Use error_abort instead of using local_err
  memory: Remove object_property_add_child_array()
  qom: Add automatic arrayification to object_property_add()
  machine: Clean up -machine handling
  qom: Make object_child_foreach() safe for objects removal

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