object: add more commands to preconfig mode

Creating and destroying QOM objects does not require a fully constructed
machine.  Allow running object-add and object-del before machine
initialization has concluded.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hmp-commands.hx

@@ -1297,6 +1297,7 @@ ERST
         .help       = "create QOM object",
         .cmd        = hmp_object_add,
         .command_completion = object_add_completion,
+        .flags      = "p",
     },
 
 SRST
@@ -1311,6 +1312,7 @@ ERST
         .help       = "destroy QOM object",
         .cmd        = hmp_object_del,
         .command_completion = object_del_completion,
+        .flags      = "p",
     },
 
 SRST

qapi/qom.json

@@ -857,7 +857,8 @@
 # <- { "return": {} }
 #
 ##
-{ 'command': 'object-add', 'data': 'ObjectOptions', 'boxed': true }
+{ 'command': 'object-add', 'data': 'ObjectOptions', 'boxed': true,
+  'allow-preconfig': true }
 
 ##
 # @object-del:
@@ -877,4 +878,5 @@
 # <- { "return": {} }
 #
 ##
-{ 'command': 'object-del', 'data': {'id': 'str'} }
+{ 'command': 'object-del', 'data': {'id': 'str'},
+  'allow-preconfig': true }