mfd: max8998: Convert to i2c_new_dummy_device

Move from i2c_new_dummy() to i2c_new_dummy_device(), so we now get an
ERRPTR which we use in error handling.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/max8998.c

@@ -195,10 +195,10 @@ static int max8998_i2c_probe(struct i2c_client *i2c,
 	}
 	mutex_init(&max8998->iolock);
 
-	max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
-	if (!max8998->rtc) {
+	max8998->rtc = i2c_new_dummy_device(i2c->adapter, RTC_I2C_ADDR);
+	if (IS_ERR(max8998->rtc)) {
 		dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
-		return -ENODEV;
+		return PTR_ERR(max8998->rtc);
 	}
 	i2c_set_clientdata(max8998->rtc, max8998);