mfd: Convert WM831x away from legacy I2C PM operations

Since the legacy bus PM operations are deprecated move the suspend
method over to dev_pm_ops.

Signed-off-by: Mark Brown <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

drivers/mfd/wm831x-i2c.c

···
 	return 0;
 }
 
-static int wm831x_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg)
+static int wm831x_i2c_suspend(struct device *dev)
 {
-	struct wm831x *wm831x = i2c_get_clientdata(i2c);
+	struct wm831x *wm831x = dev_get_drvdata(dev);
 
 	return wm831x_device_suspend(wm831x);
 }
···
 };
 MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
 
+static const struct dev_pm_ops wm831x_pm_ops = {
+	.suspend = wm831x_i2c_suspend,
+};
 
 static struct i2c_driver wm831x_i2c_driver = {
 	.driver = {
-		   .name = "wm831x",
-		   .owner = THIS_MODULE,
+		.name = "wm831x",
+		.owner = THIS_MODULE,
+		.pm = &wm831x_pm_ops,
 	},
 	.probe = wm831x_i2c_probe,
 	.remove = wm831x_i2c_remove,
-	.suspend = wm831x_i2c_suspend,
 	.id_table = wm831x_i2c_id,
 };