Merge branch 'acpi-processor'

Merge ACPI processor driver changes for 6.20-rc1/7.0-rc1:

 - Rework the ACPI idle driver initialization to register it directly
   from the common initialization code instead of doing that from a
   CPU hotplug "online" callback and clean it up (Huisong Li, Rafael
   Wysocki)

 - Fix a possible NULL pointer dereference in
   acpi_processor_errata_piix4() (Tuo Li)

* acpi-processor:
  ACPI: processor: idle: Rework the handling of acpi_processor_ffh_lpi_probe()
  ACPI: processor: idle: Convert acpi_processor_setup_cpuidle_dev() to void
  ACPI: processor: idle: Convert acpi_processor_setup_cpuidle_states() to void
  ACPI: processor: idle: Add debug log for states with invalid entry methods
  ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()
  ACPI: processor: Do not expose global variable acpi_idle_driver
  ACPI: processor: idle: Rearrange declarations in header file
  ACPI: processor: idle: Redefine two functions as void
  ACPI: processor: Update cpuidle driver check in __acpi_processor_start()
  ACPI: processor: Remove unused empty stubs of some functions
  ACPI: processor: idle: Optimize ACPI idle driver registration