cmd646: add to storage category

cmd646 is an IDE controller, so add it to the
storage category.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/ide/cmd646.c

@@ -417,6 +417,7 @@ static void cmd646_ide_class_init(ObjectClass *klass, void *data)
     k->config_read = cmd646_pci_config_read;
     k->config_write = cmd646_pci_config_write;
     dc->props = cmd646_ide_properties;
+    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 }
 
 static const TypeInfo cmd646_ide_info = {