qapi: Convert query-chardev

Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Tested-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/hmp.h b/hmp.h
index 49a5971..7388f9a 100644
--- a/hmp.h
+++ b/hmp.h
@@ -22,5 +22,6 @@
 void hmp_info_kvm(Monitor *mon);
 void hmp_info_status(Monitor *mon);
 void hmp_info_uuid(Monitor *mon);
+void hmp_info_chardev(Monitor *mon);
 
 #endif