extcon: Use to_i2c_client for both rt8973a and sm5502

Use to_i2c_client() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c
index e1bb8280..7635a8e 100644
--- a/drivers/extcon/extcon-rt8973a.c
+++ b/drivers/extcon/extcon-rt8973a.c
@@ -663,7 +663,7 @@
 #ifdef CONFIG_PM_SLEEP
 static int rt8973a_muic_suspend(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
 
 	enable_irq_wake(info->irq);
@@ -673,7 +673,7 @@
 
 static int rt8973a_muic_resume(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
 
 	disable_irq_wake(info->irq);
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
index 7aac3cc..571de2e 100644
--- a/drivers/extcon/extcon-sm5502.c
+++ b/drivers/extcon/extcon-sm5502.c
@@ -655,7 +655,7 @@
 #ifdef CONFIG_PM_SLEEP
 static int sm5502_muic_suspend(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 
 	enable_irq_wake(info->irq);
@@ -665,7 +665,7 @@
 
 static int sm5502_muic_resume(struct device *dev)
 {
-	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct i2c_client *i2c = to_i2c_client(dev);
 	struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 
 	disable_irq_wake(info->irq);