staging: iio: cdc: ad7746: clean up probe return

Slight simplication of the probe return on device register.
Signed-off-by: Lucas Stankus <lucas.p.stankus@gmail.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/45443b8306893576824effaff57d40231de8e813.1621786036.git.lucas.p.stankus@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/staging/iio/cdc/ad7746.c

@@ -734,11 +734,7 @@ static int ad7746_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
-	ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
-	if (ret)
-		return ret;
-
-	return 0;
+	return devm_iio_device_register(indio_dev->dev.parent, indio_dev);
 }
 
 static const struct i2c_device_id ad7746_id[] = {