hw/ppc: QOM'ify spapr_vio.c

Drop the old and empty SysBus init
Signed-off-by: Nxiaoqiang zhao <zxq_yx_007@163.com>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

hw/ppc/spapr_vio.c

@@ -538,21 +538,11 @@ VIOsPAPRBus *spapr_vio_bus_init(void)
     return bus;
 }
 
-/* Represents sPAPR hcall VIO devices */
-
-static int spapr_vio_bridge_init(SysBusDevice *dev)
-{
-    /* nothing */
-    return 0;
-}
-
 static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data)
 {
-    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->fw_name = "vdevice";
-    k->init = spapr_vio_bridge_init;
 }
 
 static const TypeInfo spapr_vio_bridge_info = {