ACPI: processor: idle: Reset power_setup_done flag on initialization failure

ACPI: processor: idle: Reset power_setup_done flag on initialization failure

The 'power_setup_done' flag is a key indicator used across the ACPI
processor driver to determine if cpuidle are properly configured and
available for a given CPU.

Currently, this flag is set during the early stages of initialization.
However, if the subsequent registration of the cpuidle driver in
acpi_processor_register_idle_driver() or the per-CPU device registration
in acpi_processor_power_init() fails, this flag remains set. This may
lead to some issues where other functions in ACPI idle driver use these
flags.

Fix this by explicitly resetting this flag to 0 in these error paths.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Link: https://patch.msgid.link/20260403085343.866440-1-lihuisong@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>