rtc: s35390a: 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>
Link: https://lore.kernel.org/r/20190722172618.4061-4-wsa+renesas@sang-engineering.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-s35390a.c

@@ -450,12 +450,12 @@ static int s35390a_probe(struct i2c_client *client,
 
 	/* This chip uses multiple addresses, use dummy devices for them */
 	for (i = 1; i < 8; ++i) {
-		s35390a->client[i] = i2c_new_dummy(client->adapter,
+		s35390a->client[i] = i2c_new_dummy_device(client->adapter,
 							  client->addr + i);
-		if (!s35390a->client[i]) {
+		if (IS_ERR(s35390a->client[i])) {
 			dev_err(dev, "Address %02x unavailable\n",
 				client->addr + i);
-			err = -EBUSY;
+			err = PTR_ERR(s35390a->client[i]);
 			goto exit_dummy;
 		}
 	}