The iio_validate_own_trigger() function was added in this commit [1] but it is
the same with the below function called iio_trigger_validate_own_device(). The
bodies of the functions can be found in [2], [3].
[1]: https://lore.kernel.org/all/51cd3e3e74a6addf8d333f4a109fb9c5a11086ee.1683541225.git.mazziesaccount@xxxxxxxxx/
[2]: https://elixir.bootlin.com/linux/v6.11/source/drivers/iio/industrialio-trigger.c#L732
[3]: https://elixir.bootlin.com/linux/v6.11/source/drivers/iio/industrialio-trigger.c#L752