mfd: tps80031: Convert to devm_i2c_new_dummy_device

Move from i2c_new_dummy() to devm_i2c_new_dummy_device(). So, we now get
an ERRPTR which we use in error handling and we can skip removal of the
created devices.

Signed-off-by: Wolfram Sang <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/mfd/tps80031.c

···
 		if (tps80031_slave_address[i] == client->addr)
 			tps80031->clients[i] = client;
 		else
-			tps80031->clients[i] = i2c_new_dummy(client->adapter,
-						tps80031_slave_address[i]);
-		if (!tps80031->clients[i]) {
+			tps80031->clients[i] = devm_i2c_new_dummy_device(&client->dev,
+						client->adapter, tps80031_slave_address[i]);
+		if (IS_ERR(tps80031->clients[i])) {
 			dev_err(&client->dev, "can't attach client %d\n", i);
-			ret = -ENOMEM;
-			goto fail_client_reg;
+			return PTR_ERR(tps80031->clients[i]);
 		}
 
 		i2c_set_clientdata(tps80031->clients[i], tps80031);
···
 			ret = PTR_ERR(tps80031->regmap[i]);
 			dev_err(&client->dev,
 				"regmap %d init failed, err %d\n", i, ret);
-			goto fail_client_reg;
+			return ret;
 		}
 	}
 
···
 	if (ret < 0) {
 		dev_err(&client->dev,
 			"Silicon version number read failed: %d\n", ret);
-		goto fail_client_reg;
+		return ret;
 	}
 
 	ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
···
 	if (ret < 0) {
 		dev_err(&client->dev,
 			"Silicon eeprom version read failed: %d\n", ret);
-		goto fail_client_reg;
+		return ret;
 	}
 
 	dev_info(&client->dev, "ES version 0x%02x and EPROM version 0x%02x\n",
···
 	ret = tps80031_irq_init(tps80031, client->irq, pdata->irq_base);
 	if (ret) {
 		dev_err(&client->dev, "IRQ init failed: %d\n", ret);
-		goto fail_client_reg;
+		return ret;
 	}
 
 	tps80031_pupd_init(tps80031, pdata);
···
 
 fail_mfd_add:
 	regmap_del_irq_chip(client->irq, tps80031->irq_data);
-
-fail_client_reg:
-	for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
-		if (tps80031->clients[i]  && (tps80031->clients[i] != client))
-			i2c_unregister_device(tps80031->clients[i]);
-	}
 	return ret;
 }