sysbus: rename sysbus_init_mmio_region() to sysbus_init_mmio()

Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/hw/grlib_irqmp.c b/hw/grlib_irqmp.c
index dce0bbb..2872556 100644
--- a/hw/grlib_irqmp.c
+++ b/hw/grlib_irqmp.c
@@ -349,7 +349,7 @@
 
     irqmp->state = g_malloc0(sizeof *irqmp->state);
 
-    sysbus_init_mmio_region(dev, &irqmp->iomem);
+    sysbus_init_mmio(dev, &irqmp->iomem);
 
     return 0;
 }