qapi: Convert migrate_cancel

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 131b21c..e48c2ca 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -771,8 +771,7 @@
         .args_type  = "",
         .params     = "",
         .help       = "cancel the current VM migration",
-        .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_migrate_cancel,
+        .mhandler.cmd = hmp_migrate_cancel,
     },
 
 STEXI