mfd: max8907: 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/max8907.c

@@ -214,9 +214,9 @@ static int max8907_i2c_probe(struct i2c_client *i2c,
 		goto err_regmap_gen;
 	}
 
-	max8907->i2c_rtc = i2c_new_dummy(i2c->adapter, MAX8907_RTC_I2C_ADDR);
-	if (!max8907->i2c_rtc) {
-		ret = -ENOMEM;
+	max8907->i2c_rtc = i2c_new_dummy_device(i2c->adapter, MAX8907_RTC_I2C_ADDR);
+	if (IS_ERR(max8907->i2c_rtc)) {
+		ret = PTR_ERR(max8907->i2c_rtc);
 		goto err_dummy_rtc;
 	}
 	i2c_set_clientdata(max8907->i2c_rtc, max8907);