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

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

Machine queue, 2020-02-28

Cleanups:
* Fix NMI() macro (Philippe Mathieu-Daudé)
* Make MachineClass::is_default boolean, refuse multiple
  default machines (Philippe Mathieu-Daudé)

# gpg: Signature made Fri 28 Feb 2020 21:03:20 GMT
# gpg:                using RSA key 5A322FD5ABC4D3DBACCFD1AA2807936F984DC5A6
# gpg:                issuer "ehabkost@redhat.com"
# 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:
  vl: Abort if multiple machines are registered as default
  hw: Make MachineClass::is_default a boolean type
  hw: Do not initialize MachineClass::is_default to 0
  hw/nmi: Fix the NMI() macro, based on INTERFACE_CHECK()

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