mfd: Use to_i2c_client() instead of open-coding it

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index d19be64..d959ebb 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -352,7 +352,7 @@
 #ifdef CONFIG_PM_SLEEP
 static int max77686_suspend(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
 
 	if (device_may_wakeup(dev))
@@ -374,7 +374,7 @@
 
 static int max77686_resume(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
 
 	if (device_may_wakeup(dev))