hw/misc/edu: add msi_uninit() for pci_edu_uninit()

Let's supplement the msi_uninit() when failing to realize
the pci edu device.
Reported-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NFei Li <shirley17fei@gmail.com>
Reviewed-by: NMarcel Apfelbaum <marcel.apfelbaum@gmail.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NPeter Xu <peterx@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/misc/edu.c

@@ -377,6 +377,7 @@ static void pci_edu_uninit(PCIDevice *pdev)
     qemu_mutex_destroy(&edu->thr_mutex);
 
     timer_del(&edu->dma_timer);
+    msi_uninit(pdev);
 }
 
 static void edu_obj_uint64(Object *obj, Visitor *v, const char *name,