ACPI: AC: Properly notify powermanagement core about changes

The powermanagement core does various actions when a powersupply changes.
It calls into notifiers, LED triggers, other power supplies and emits an uevent.

To make sure that all these actions happen properly call power_supply_changed().

Reported-by: Rajas Paranjpe <paranjperajas@gmail.com>
Closes: https://github.com/MrChromebox/firmware/issues/420#issuecomment-2132251318
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>