qdev: Move softmmu properties to qdev-properties-system.h

Move the property types and property macros implemented in
qdev-properties-system.c to a new qdev-properties-system.h
header.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20201211220529.2290218-16-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
diff --git a/hw/ipmi/ipmi_bmc_sim.c b/hw/ipmi/ipmi_bmc_sim.c
index f78e92d..55fb81f 100644
--- a/hw/ipmi/ipmi_bmc_sim.c
+++ b/hw/ipmi/ipmi_bmc_sim.c
@@ -30,6 +30,7 @@
 #include "qemu/module.h"
 #include "hw/loader.h"
 #include "hw/qdev-properties.h"
+#include "hw/qdev-properties-system.h"
 #include "migration/vmstate.h"
 
 #define IPMI_NETFN_CHASSIS            0x00