qdev: move comment

Move comment back next to main_system_bus to avoid confusion.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/qdev.c

@@ -30,9 +30,9 @@
 #include "sysemu.h"
 #include "monitor.h"
 
-/* This is a nasty hack to allow passing a NULL bus to qdev_create.  */
 static int qdev_hotplug = 0;
 
+/* This is a nasty hack to allow passing a NULL bus to qdev_create.  */
 static BusState *main_system_bus;
 
 static DeviceInfo *device_info_list;