ACPI: battery: use DEFINE_SIMPLE_DEV_PM_OPS

Use the recommended macro to define the PM ops.

Also use pm_sleep_ptr() when assigning the ops to the driver.
This allows the removal of the ifdef CONFIG_PM_SLEEP.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20240904-acpi-battery-cleanups-v1-4-a3bf74f22d40@weissschuh.net


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