iio: adis_trigger: Remove code to set trigger parent

iio_trigger_set_drvdata() sets the trigger device parent to first
argument of viio_trigger_alloc(), no need to do it again in the driver
code.
Remove adis_trigger_setup() to match other drivers where setting the
trigger is usually done in the probe() routine.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210309193620.2176163-4-gwendal@chromium.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/adis_trigger.c

@@ -27,13 +27,6 @@ static const struct iio_trigger_ops adis_trigger_ops = {
 	.set_trigger_state = &adis_data_rdy_trigger_set_state,
 };
 
-static void adis_trigger_setup(struct adis *adis)
-{
-	adis->trig->dev.parent = &adis->spi->dev;
-	adis->trig->ops = &adis_trigger_ops;
-	iio_trigger_set_drvdata(adis->trig, adis);
-}
-
 static int adis_validate_irq_flag(struct adis *adis)
 {
 	/*
@@ -72,7 +65,8 @@ int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
 	if (!adis->trig)
 		return -ENOMEM;
 
-	adis_trigger_setup(adis);
+	adis->trig->ops = &adis_trigger_ops;
+	iio_trigger_set_drvdata(adis->trig, adis);
 
 	ret = adis_validate_irq_flag(adis);
 	if (ret)