libqos/pci: Enable bus mastering

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/tests/libqos/pci.c b/tests/libqos/pci.c
index 95e287b..7e0907b 100644
--- a/tests/libqos/pci.c
+++ b/tests/libqos/pci.c
@@ -71,7 +71,7 @@
 
     /* FIXME -- does this need to be a bus callout? */
     cmd = qpci_config_readw(dev, PCI_COMMAND);
-    cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
+    cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
     qpci_config_writew(dev, PCI_COMMAND, cmd);
 }