iio:humidity:si7020: fix pointer to i2c client

In si7020_read_raw() the pointer to the i2c client was obtained as second level
pointer, although a simple pointer is appropriate.
Signed-off-by: NHartmut Knaack <knaack.h@gmx.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/iio/humidity/si7020.c

@@ -45,12 +45,12 @@ static int si7020_read_raw(struct iio_dev *indio_dev,
 			   struct iio_chan_spec const *chan, int *val,
 			   int *val2, long mask)
 {
-	struct i2c_client **client = iio_priv(indio_dev);
+	struct i2c_client *client = iio_priv(indio_dev);
 	int ret;
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		ret = i2c_smbus_read_word_data(*client,
+		ret = i2c_smbus_read_word_data(client,
 					       chan->type == IIO_TEMP ?
 					       SI7020CMD_TEMP_HOLD :
 					       SI7020CMD_RH_HOLD);