remove QEMUMachine indirection from MachineClass

Note: this is a resend (I sent the series some time ago with no luck),
sorry if you get this series twice.

This is a continuation of 'QEMU Machine as QOM object' effort.
The scope of this series is to allow machine QOM-ification
of all machines gradually, by removing the need for QEMUMachine registration through vl.c .

Now we will have 2 paths:
1. Non QOM-ified machines will be converted to QOM on the fly in vl.c by qemu machine registration.
2. QOM-ified machines will behave as regular QOM classes setting MachineClass fields in class_init.
- Patch 4/5 demonstrates this.

Next steps:
- Replace QemuOpts queries by MachineState fields.
- Follow Paolo's sugestions to get rid of QEMUMachineInitArgs.

Comments are appreciated,

Thanks,
Marcel

Marcel Apfelbaum (5):
hw/boards.h: add QEMUMachine's fields to MachineClass
machine: remove QEMUMachine indirection from MachineClass
machine: replace QEMUMachine by MachineClass in accelerator
configuration
hw/ppc: remove QEMUMachine indirection
vl.c: Remove QEMUMachine usage

 device-hotplug.c        |   2 +-
 hw/ppc/spapr.c          |  26 +++++------
 include/hw/boards.h     |  30 +++++++++++--
 include/hw/xen/xen.h    |   2 +-
 include/qemu/typedefs.h |   1 +
 include/sysemu/kvm.h    |   2 +-
 include/sysemu/qtest.h  |   2 +-
 kvm-all.c               |   6 +--
 kvm-stub.c              |   2 +-
 qmp.c                   |   4 +-
 qtest.c                 |   2 +-
 vl.c                    | 114 +++++++++++++++++++++++++++---------------------
 xen-all.c               |   2 +-
 xen-stub.c              |   2 +-
 14 files changed, 116 insertions(+), 81 deletions(-)

1.8.3.1