This device doesn't have fields to migrate. Be explicit
by using vmstate_qdev_no_state_to_migrate.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/arm/aspeed_soc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
index 311458aa76..b15984e4d3 100644
--- a/hw/arm/aspeed_soc.c
+++ b/hw/arm/aspeed_soc.c
@@ -442,6 +442,7 @@ static void aspeed_soc_class_init(ObjectClass *oc, void *data)
     dc->realize = aspeed_soc_realize;
     /* Reason: Uses serial_hds and nd_table in realize() directly */
     dc->user_creatable = false;
+    dc->vmsd = vmstate_qdev_no_state_to_migrate;
     device_class_set_props(dc, aspeed_soc_properties);
 }
 
-- 
2.21.3