hw/t*: pass owner to memory_region_init* functions

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/timer/pxa2xx_timer.c b/hw/timer/pxa2xx_timer.c
index dd41a10..4d28719 100644
--- a/hw/timer/pxa2xx_timer.c
+++ b/hw/timer/pxa2xx_timer.c
@@ -461,7 +461,7 @@
         }
     }
 
-    memory_region_init_io(&s->iomem, NULL, &pxa2xx_timer_ops, s,
+    memory_region_init_io(&s->iomem, OBJECT(s), &pxa2xx_timer_ops, s,
                           "pxa2xx-timer", 0x00001000);
     sysbus_init_mmio(dev, &s->iomem);