hwmon: Use i2c_smbus_{read,write}_word_swapped

Make use of the new i2c_smbus_{read,write}_word_swapped functions.
This makes the driver code more compact and readable. It also ensures
proper error handling.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Dirk Eibach <eibach@gdsys.de>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Guillaume Ligneul <guillaume.ligneul@gmail.com>
diff --git a/drivers/hwmon/ad7414.c b/drivers/hwmon/ad7414.c
index d46c0c7..df29a7f 100644
--- a/drivers/hwmon/ad7414.c
+++ b/drivers/hwmon/ad7414.c
@@ -58,10 +58,9 @@
 
 static inline int ad7414_read(struct i2c_client *client, u8 reg)
 {
-	if (reg == AD7414_REG_TEMP) {
-		int value = i2c_smbus_read_word_data(client, reg);
-		return (value < 0) ? value : swab16(value);
-	} else
+	if (reg == AD7414_REG_TEMP)
+		return i2c_smbus_read_word_swapped(client, reg);
+	else
 		return i2c_smbus_read_byte_data(client, reg);
 }