mfd: 88pm860x: Convert to managed resources for allocating memory

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

drivers/mfd/88pm860x-core.c

···
 		return -EINVAL;
 	}
 
-	chip = kzalloc(sizeof(struct pm860x_chip), GFP_KERNEL);
+	chip = devm_kzalloc(&client->dev,
+			    sizeof(struct pm860x_chip), GFP_KERNEL);
 	if (chip == NULL)
 		return -ENOMEM;
 
···
 		ret = PTR_ERR(chip->regmap);
 		dev_err(&client->dev, "Failed to allocate register map: %d\n",
 				ret);
-		kfree(chip);
 		return ret;
 	}
 	chip->client = client;
···
 		regmap_exit(chip->regmap_companion);
 		i2c_unregister_device(chip->companion);
 	}
-	kfree(chip);
 	return 0;
 }