wdt_ib700: replace register_ioport*

Convert over to memory regions to obsolete register_ioport*.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/watchdog/wdt_ib700.c

@@ -97,15 +97,23 @@ static const VMStateDescription vmstate_ib700 = {
     }
 };
 
+static const MemoryRegionPortio wdt_portio_list[] = {
+    { 0x441, 2, 1, .write = ib700_write_disable_reg, },
+    { 0x443, 2, 1, .write = ib700_write_enable_reg, },
+    PORTIO_END_OF_LIST(),
+};
+
 static void wdt_ib700_realize(DeviceState *dev, Error **errp)
 {
     IB700State *s = IB700(dev);
+    PortioList *port_list = g_new(PortioList, 1);
 
     ib700_debug("watchdog init\n");
 
     s->timer = qemu_new_timer_ns(vm_clock, ib700_timer_expired, s);
-    register_ioport_write(0x441, 2, 1, ib700_write_disable_reg, s);
-    register_ioport_write(0x443, 2, 1, ib700_write_enable_reg, s);
+
+    portio_list_init(port_list, wdt_portio_list, s, "ib700");
+    portio_list_add(port_list, isa_address_space_io(&s->parent_obj), 0);
 }
 
 static void wdt_ib700_reset(DeviceState *dev)