Merge remote-tracking branch 'remotes/ehabkost/tags/machine-next-pull-request' into staging

Machine Core queue, 2019-05-24

* Display more helpful message when an object type is missing
  (Philippe Mathieu-Daudé)
* Use object_initialize_child for correct reference counting
  (Philippe Mathieu-Daudé)

# gpg: Signature made Fri 24 May 2019 19:31:06 BST
# gpg:                using RSA key 2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>" [full]
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/machine-next-pull-request:
  hw/intc/nvic: Use object_initialize_child for correct reference counting
  hw/arm/mps2: Use object_initialize_child for correct reference counting
  hw/microblaze/zynqmp: Use object_initialize_child for correct ref. counting
  hw/microblaze/zynqmp: Use object_initialize_child for correct ref. counting
  hw/microblaze/zynqmp: Let the SoC manage the IPI devices
  hw/microblaze/zynqmp: Move the IPI state into the PMUSoC state
  hw/mips: Use object_initialize_child for correct reference counting
  hw/mips: Use object_initialize() on MIPSCPSState
  hw/arm: Use object_initialize_child for correct reference counting
  hw/arm/aspeed: Use object_initialize_child for correct ref. counting
  hw/arm/bcm2835: Use object_initialize_child for correct ref. counting
  hw/arm/bcm2835: Use object_initialize() on PL011State
  hw/arm/bcm2835: Use TYPE_PL011 instead of hardcoded string
  hw/virtio: Use object_initialize_child for correct reference counting
  hw/misc/macio: Use object_initialize_child for correct ref. counting
  hw/ppc/pnv: Use object_initialize_child for correct reference counting
  qom/object: Display more helpful message when an object type is missing

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