pseries: Remove unused fields from VIOsPAPRBus structure

The VIOsPAPRBus structure, used on the pseries machine contains some old
fields which are no longer used anywhere.  This patch removes them.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NAndreas Färber <afaerber@suse.de>

hw/spapr_vio.h

@@ -89,8 +89,6 @@ struct VIOsPAPRDevice {
 
 struct VIOsPAPRBus {
     BusState bus;
-    const char *dt_name, *dt_type, *dt_compatible;
-    target_ulong signal_mask;
     int (*init)(VIOsPAPRDevice *dev);
     int (*devnode)(VIOsPAPRDevice *dev, void *fdt, int node_off);
 };