platform/chrome: cros_ec: Unregister notifier in cros_ec_unregister()

The blocking notifier is registered in cros_ec_register(); however, it
isn't unregistered in cros_ec_unregister().

Fix it.

Fixes: 42cd0ab ("platform/chrome: cros_ec: Query EC protocol version if EC transitions between RO/RW")
Cc: [email protected]
Reviewed-by: Benson Leung <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Tzung-Bi Shih <[email protected]>

Author: Tzung-Bi Shih

drivers/platform/chrome/cros_ec.c

@@ -318,6 +318,9 @@ EXPORT_SYMBOL(cros_ec_register);
  */
 void cros_ec_unregister(struct cros_ec_device *ec_dev)
 {
+	if (ec_dev->mkbp_event_supported)
+		blocking_notifier_chain_unregister(&ec_dev->event_notifier,
+						   &ec_dev->notifier_ready);
 	platform_device_unregister(ec_dev->pd);
 	platform_device_unregister(ec_dev->ec);
 	mutex_destroy(&ec_dev->lock);