hw/hppa: Add BMC on 64-bit machines only

Prevent adding the BMC with it's serial ports on 32-bit machines, even
if they have a PCI bus like the B160L. This fixes boot problems with
HP-UX on B160L.

Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: 557bc5260c ("hw/hppa: PCI devices depend on availability of PCI bus")
Cc: qemu-stable@nongnu.org
Reviewed-by: Anton Johansson <anjo@rev.ng>

hw/hppa/machine.c

@@ -376,7 +376,9 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
 
     if (pci_bus) {
         pci_init_nic_devices(pci_bus, mc->default_nic);
+    }
 
+    if (pci_bus && hppa_is_pa20(&cpu[0]->env)) {
         /* BMC board: HP Diva GSP PCI card */
         dev = qdev_new("diva-gsp");
         if (dev && !object_property_get_bool(OBJECT(dev), "disable", NULL)) {