drivers:iio:accel:mma8452: added cleanup provision in case of failure.

mma8452_set_freefall_mode can return -ve value in case if
i2c_smbus_read_byte_data fails. This function is called from mma8452_probe,
and returning -ve value from probe indicates probe failure. Need to call
iio_triggered_buffer_cleanup & iio_trigger_cleanup in this case.
Signed-off-by: Bijosh Thykkoottathil <bijosh.t@hotmail.com>
Acked-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/accel/mma8452.c

@@ -1579,8 +1579,8 @@ static int mma8452_probe(struct i2c_client *client,
 		goto buffer_cleanup;
 
 	ret = mma8452_set_freefall_mode(data, false);
-	if (ret)
-		return ret;
+	if (ret < 0)
+		goto buffer_cleanup;
 
 	return 0;