regulator: max8952: simplify getting the adapter of a client

We have a dedicated pointer for that, so use it. Much easier to read and
less computation involved.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/max8952.c

@@ -192,7 +192,7 @@ static struct max8952_platform_data *max8952_parse_dt(struct device *dev)
 static int max8952_pmic_probe(struct i2c_client *client,
 		const struct i2c_device_id *i2c_id)
 {
-	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+	struct i2c_adapter *adapter = client->adapter;
 	struct max8952_platform_data *pdata = dev_get_platdata(&client->dev);
 	struct regulator_config config = { };
 	struct max8952_data *max8952;