hwmon: (acpi_power_meter) Fix update the power trip points on failure

The power trip points maintained in local should not be updated when '_PTP'
method fails to evaluate.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Link: https://lore.kernel.org/r/20250109081708.27366-3-lihuisong@huawei.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>