qxl: put QXL_IO_UPDATE_IRQ into vgamode whitelist

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/hw/qxl.c b/hw/qxl.c
index 5e49536..848c90f 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -942,6 +942,7 @@
     case QXL_IO_MEMSLOT_ADD:
     case QXL_IO_MEMSLOT_DEL:
     case QXL_IO_CREATE_PRIMARY:
+    case QXL_IO_UPDATE_IRQ:
         break;
     default:
         if (d->mode == QXL_MODE_NATIVE || d->mode == QXL_MODE_COMPAT)