VL53L0X can be configured to use interrupt pin (GPIO1)
to notify host about readiness of new measurement.

If interrupt pin is not specified, driver still uses polling.
Signed-off-by: Ivan Drobyshevskyi <drobyshevskyi@gmail.com>
Link: https://lore.kernel.org/r/20200916074458.873359-2-drobyshevskyi@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>