vfio: Fix debug message compile error

This fixes a compiler error which occurs if DEBUG_VFIO is defined.
Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

hw/vfio/pci.c

@@ -516,7 +516,7 @@ static void vfio_msi_interrupt(void *opaque)
         abort();
     }
 
-    trace_vfio_msi_interrupt(vbasedev->name, nr, msg.address, msg.data);
+    trace_vfio_msi_interrupt(vdev->vbasedev.name, nr, msg.address, msg.data);
 #endif
 
     if (vdev->interrupt == VFIO_INT_MSIX) {