sysbus: rename sysbus_init_mmio_region() to sysbus_init_mmio()

Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/hw/milkymist-pfpu.c b/hw/milkymist-pfpu.c
index 672f6e4..dc92eb6 100644
--- a/hw/milkymist-pfpu.c
+++ b/hw/milkymist-pfpu.c
@@ -499,7 +499,7 @@
 
     memory_region_init_io(&s->regs_region, &pfpu_mmio_ops, s,
             "milkymist-pfpu", MICROCODE_END * 4);
-    sysbus_init_mmio_region(dev, &s->regs_region);
+    sysbus_init_mmio(dev, &s->regs_region);
 
     return 0;
 }