nvdimm: add a macro for property "label-size"

Signed-off-by: NHaozhong Zhang <haozhong.zhang@intel.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20171211072806.2812-3-haozhong.zhang@intel.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>

hw/mem/nvdimm.c

@@ -66,7 +66,7 @@ out:
 
 static void nvdimm_init(Object *obj)
 {
-    object_property_add(obj, "label-size", "int",
+    object_property_add(obj, NVDIMM_LABLE_SIZE_PROP, "int",
                         nvdimm_get_label_size, nvdimm_set_label_size, NULL,
                         NULL, NULL);
 }

include/hw/mem/nvdimm.h

@@ -47,6 +47,9 @@
 #define NVDIMM_CLASS(oc) OBJECT_CLASS_CHECK(NVDIMMClass, (oc), TYPE_NVDIMM)
 #define NVDIMM_GET_CLASS(obj) OBJECT_GET_CLASS(NVDIMMClass, (obj), \
                                                TYPE_NVDIMM)
+
+#define NVDIMM_LABLE_SIZE_PROP "label-size"
+
 struct NVDIMMDevice {
     /* private */
     PCDIMMDevice parent_obj;