ACPI: battery: allocate driver data through devm_ APIs

Simplify the cleanup logic a bit.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20240904-acpi-battery-cleanups-v1-2-a3bf74f22d40@weissschuh.net
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: t-8ch

drivers/acpi/battery.c

@@ -1218,7 +1218,7 @@ static int acpi_battery_add(struct acpi_device *device)
 	if (device->dep_unmet)
 		return -EPROBE_DEFER;
 
-	battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
+	battery = devm_kzalloc(&device->dev, sizeof(*battery), GFP_KERNEL);
 	if (!battery)
 		return -ENOMEM;
 	battery->device = device;
@@ -1258,7 +1258,6 @@ static int acpi_battery_add(struct acpi_device *device)
 	sysfs_remove_battery(battery);
 	mutex_destroy(&battery->lock);
 	mutex_destroy(&battery->sysfs_lock);
-	kfree(battery);
 
 	return result;
 }
@@ -1281,7 +1280,6 @@ static void acpi_battery_remove(struct acpi_device *device)
 
 	mutex_destroy(&battery->lock);
 	mutex_destroy(&battery->sysfs_lock);
-	kfree(battery);
 }
 
 #ifdef CONFIG_PM_SLEEP