Include hw/qdev-properties.h less

In my "build everything" tree, changing hw/qdev-properties.h triggers
a recompile of some 2700 out of 6600 objects (not counting tests and
objects that don't depend on qemu/osdep.h).

Many places including hw/qdev-properties.h (directly or via hw/qdev.h)
actually need only hw/qdev-core.h.  Include hw/qdev-core.h there
instead.

hw/qdev.h is actually pointless: all it does is include hw/qdev-core.h
and hw/qdev-properties.h, which in turn includes hw/qdev-core.h.
Replace the remaining uses of hw/qdev.h by hw/qdev-properties.h.

While there, delete a few superfluous inclusions of hw/qdev-core.h.

Touching hw/qdev-properties.h now recompiles some 1200 objects.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190812052359.30071-22-armbru@redhat.com>
diff --git a/hw/input/virtio-input.c b/hw/input/virtio-input.c
index 9946394..51617a5 100644
--- a/hw/input/virtio-input.c
+++ b/hw/input/virtio-input.c
@@ -10,8 +10,8 @@
 #include "qemu/module.h"
 #include "trace.h"
 
-#include "hw/qdev.h"
 #include "hw/virtio/virtio.h"
+#include "hw/qdev-properties.h"
 #include "hw/virtio/virtio-input.h"
 
 #include "standard-headers/linux/input.h"