Clean up pci_drive_hot_add()'s use of BlockInterfaceType pci_drive_hot_add() parameter type has the wrong type: int instead of BlockInterfaceType. It's actually redundant, so we can just drop it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>