ACPI / dock: Pass ACPI device pointer to acpi_device_is_battery()

Since we already know what the device's PNP IDs are when
acpi_device_is_battery() is called, it is not necessary to run
acpi_get_object_info() for the device in that function.  Instead, if
acpi_device_is_battery() is passed a pointer to a struct acpi_device
object, it can use the list of PNP IDs from that object, so make that
happen and modify the function's header accordingly

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/dock.c

@@ -793,7 +793,7 @@ void acpi_dock_add(struct acpi_device *adev)
 		dock_station->flags |= DOCK_IS_DOCK;
 	if (acpi_ata_match(handle))
 		dock_station->flags |= DOCK_IS_ATA;
-	if (acpi_device_is_battery(handle))
+	if (acpi_device_is_battery(adev))
 		dock_station->flags |= DOCK_IS_BAT;
 
 	ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group);