monitor: Convert do_system_powerdown() to QObject

Patchworks-ID: 35346
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

monitor.c

@@ -1301,7 +1301,11 @@ static void do_system_reset(Monitor *mon, const QDict *qdict,
     qemu_system_reset_request();
 }
 
-static void do_system_powerdown(Monitor *mon, const QDict *qdict)
+/**
+ * do_system_powerdown(): Issue a machine powerdown
+ */
+static void do_system_powerdown(Monitor *mon, const QDict *qdict,
+                                QObject **ret_data)
 {
     qemu_system_powerdown_request();
 }

qemu-monitor.hx

@@ -482,7 +482,8 @@ ETEXI
         .args_type  = "",
         .params     = "",
         .help       = "send system power down event",
-        .mhandler.cmd = do_system_powerdown,
+        .user_print = monitor_user_noop,
+        .mhandler.cmd_new = do_system_powerdown,
     },
 
 STEXI