block: Rename qemu_aio_release -> qemu_aio_unref

Suggested-by: BenoƮt Canet <benoit.canet@irqsave.net>
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/hw/ide/core.c b/hw/ide/core.c
index 055d150..190700a 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -397,7 +397,7 @@
 
     qemu_bh_delete(iocb->bh);
     iocb->bh = NULL;
-    qemu_aio_release(iocb);
+    qemu_aio_unref(iocb);
 }
 
 static void ide_issue_trim_cb(void *opaque, int ret)