monitor: do_balloon(): Use 'M' argument type

This makes do_balloon() accept megabyte values from the user
Monitor while accepting byte values for QMP.

Signed-off-by: Luiz Capitulino <[email protected]>
Signed-off-by: Anthony Liguori <[email protected]>
diff --git a/qemu-monitor.hx b/qemu-monitor.hx
index 338e30e..aac0f3e 100644
--- a/qemu-monitor.hx
+++ b/qemu-monitor.hx
@@ -887,7 +887,7 @@
 
     {
         .name       = "balloon",
-        .args_type  = "value:i",
+        .args_type  = "value:M",
         .params     = "target",
         .help       = "request VM to change it's memory allocation (in MB)",
         .user_print = monitor_user_noop,