virtio-blk: alias bootindex property explicitly for virt-blk-pci/ccw/s390

Since the "bootindex" property is a QOM property and not a qdev property
now, we must alias it explicitly for virtio-blk-pci, as well as CCW and
s390-virtio.
Signed-off-by: NGonglei <arei.gonglei@huawei.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

hw/s390x/s390-virtio-bus.c

@@ -185,6 +185,8 @@ static void s390_virtio_blk_instance_init(Object *obj)
                                 TYPE_VIRTIO_BLK);
     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
                               &error_abort);
+    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
+                              "bootindex", &error_abort);
 }
 
 static int s390_virtio_serial_init(VirtIOS390Device *s390_dev)

hw/s390x/virtio-ccw.c

@@ -819,6 +819,8 @@ static void virtio_ccw_blk_instance_init(Object *obj)
                                 TYPE_VIRTIO_BLK);
     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
                               &error_abort);
+    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
+                              "bootindex", &error_abort);
 }
 
 static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev)

hw/virtio/virtio-pci.c

@@ -1115,6 +1115,8 @@ static void virtio_blk_pci_instance_init(Object *obj)
                                 TYPE_VIRTIO_BLK);
     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
                               &error_abort);
+    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
+                              "bootindex", &error_abort);
 }
 
 static const TypeInfo virtio_blk_pci_info = {