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/max8997.c b/drivers/mfd/max8997.c
index 156ed6f..f316348 100644
--- a/drivers/mfd/max8997.c
+++ b/drivers/mfd/max8997.c
@@ -437,7 +437,7 @@
 
 static int max8997_freeze(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 	int i;
 
@@ -459,7 +459,7 @@
 
 static int max8997_restore(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 	int i;
 
@@ -481,7 +481,7 @@
 
 static int max8997_suspend(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 
 	if (device_may_wakeup(dev))
@@ -491,7 +491,7 @@
 
 static int max8997_resume(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 
 	if (device_may_wakeup(dev))