iio: potentiometer: tpl0102: remove unneeded i2c check functionality test

Actually I2C_FUNC_SMBUS_WORD_DATA isn't need for this device, and regmap
handles all single byte reads transparently.

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/potentiometer/tpl0102.c

@@ -116,10 +116,6 @@ static int tpl0102_probe(struct i2c_client *client,
 	struct tpl0102_data *data;
 	struct iio_dev *indio_dev;
 
-	if (!i2c_check_functionality(client->adapter,
-				     I2C_FUNC_SMBUS_WORD_DATA))
-		return -EOPNOTSUPP;
-
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 	if (!indio_dev)
 		return -ENOMEM;