hwmon: (ad7414) Make ad7414_update_device() static

This patch makes the needlessly global ad7414_update_device() static.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/ad7414.c b/drivers/hwmon/ad7414.c
index ce8d94f..bfda8c8 100644
--- a/drivers/hwmon/ad7414.c
+++ b/drivers/hwmon/ad7414.c
@@ -69,7 +69,7 @@
 	return i2c_smbus_write_byte_data(client, reg, value);
 }
 
-struct ad7414_data *ad7414_update_device(struct device *dev)
+static struct ad7414_data *ad7414_update_device(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct ad7414_data *data = i2c_get_clientdata(client);