monitor: add del completion for peripheral device

Add peripheral_device_del_completion() to let peripheral device del completion
be possible.
Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

monitor.c

@@ -4341,6 +4341,31 @@ static void device_del_bus_completion(ReadLineState *rs,  BusState *bus,
     }
 }
 
+static void peripheral_device_del_completion(ReadLineState *rs,
+                                             const char *str, size_t len)
+{
+    Object *peripheral;
+    GSList *list = NULL, *item;
+
+    peripheral = object_resolve_path("/machine/peripheral/", NULL);
+    if (peripheral == NULL) {
+        return;
+    }
+
+    object_child_foreach(peripheral, qdev_build_hotpluggable_device_list,
+                         &list);
+
+    for (item = list; item; item = g_slist_next(item)) {
+        DeviceState *dev = item->data;
+
+        if (dev->id && !strncmp(str, dev->id, len)) {
+            readline_add_completion(rs, dev->id);
+        }
+    }
+
+    g_slist_free(list);
+}
+
 void chardev_remove_completion(ReadLineState *rs, int nb_args, const char *str)
 {
     size_t len;
@@ -4414,6 +4439,7 @@ void device_del_completion(ReadLineState *rs, int nb_args, const char *str)
     len = strlen(str);
     readline_set_completion_index(rs, len);
     device_del_bus_completion(rs, sysbus_get_default(), str, len);
+    peripheral_device_del_completion(rs, str, len);
 }
 
 void object_del_completion(ReadLineState *rs, int nb_args, const char *str)