iio: potentiometer: tpl0102: change i2c functionality return code

Change i2c_check_functionality condition check return from ENOTSUPP to
EOPNOTSUPP which is now the standard return code.
Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/potentiometer/tpl0102.c

@@ -118,7 +118,7 @@ static int tpl0102_probe(struct i2c_client *client,
 
 	if (!i2c_check_functionality(client->adapter,
 				     I2C_FUNC_SMBUS_WORD_DATA))
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 	if (!indio_dev)