Make qemu-io commands available in HMP

It was decided to not make this command available in QMP in order to
make clear that this is not supposed to be a stable API and should be
used only for testing and debugging purposes.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/hmp.h b/hmp.h
index 95fe76e..56d2e92 100644
--- a/hmp.h
+++ b/hmp.h
@@ -85,5 +85,6 @@
 void hmp_nbd_server_stop(Monitor *mon, const QDict *qdict);
 void hmp_chardev_add(Monitor *mon, const QDict *qdict);
 void hmp_chardev_remove(Monitor *mon, const QDict *qdict);
+void hmp_qemu_io(Monitor *mon, const QDict *qdict);
 
 #endif