edgetpu: unregister KCI irq handler Unregister KCI irq handler while cancelling KCI work queues to avoid serving interrupt in case of device in power down state. Bug: 210571509 Note:206717576,204847583 Signed-off-by: Nishant Prajapati <[email protected]> Change-Id: Ia77c0470c82bae39086b498f31a598b996a715eb