ACPI updates for 5.20-rc1

 - Use facilities provided by the driver core and some additional
   helpers to handle the children of a given ACPI device object in
   multiple places instead of using the children and node list heads in
   struct acpi_device which is error prone (Rafael Wysocki).

 - Fix ACPI-related device reference counting issue in the hisi_lpc bus
   driver (Yang Yingliang).

 - Drop the children and node list heads that are not needed any more
   from struct acpi_device (Rafael Wysocki).

 - Drop driver member from struct acpi_device (Uwe Kleine-König).

 - Drop redundant check from acpi_device_remove() (Uwe Kleine-König).

 - Prepare the CPPC library for handling backwards-compatible future
   _CPC return package formats gracefully (Rafael Wysocki).

 - Clean up the ACPI EC driver after previous changes in it (Hans
   de Goede).

 - Drop leftover acpi_processor_get_limit_info() declaration (Riwen
   Lu).

 - Split out thermal initialization from ACPI PSS (Riwen Lu).

 - Annotate more functions in the ACPI CPU idle driver to live in the
   cpuidle section (Guilherme G. Piccoli).

 - Fix _EINJ vs "special purpose" EFI memory regions (Dan Williams).

 - Implement a better fix to avoid spamming the console with old error
   logs (Tony Luck).

 - Fix typo in a comment in the APEI code (Xiang wangx).

 - Save NVS memory during transitions into S3 on Lenovo G40-45 (Manyi
   Li).

 - Add support for upcoming AMD uPEP device ID AMDI008 to the ACPI
   suspend-to-idle driver for x86 platforms (Shyam Sundar S K).

 - Clean up checks related to the ACPI_FADT_LOW_POWER_S0 platform flag
   in the LPIT table driver and the suspend-to-idle driver for x86
   platforms (Rafael Wysocki).

 - Print information messages regarding declared LPS0 idle support in
   the platform firmware (Rafael Wysocki).

 - Fix missing check in register_device_clock() in the ACPI driver for
   Intel SoCs (huhai).

 - Fix ACS setup in the VIOT table parser (Eric Auger).

 - Skip IRQ override on AMD Zen platforms where it's harmful (Chuanhong
   Guo).

 - Use native backlight on Dell Inspiron N4010 (Hans de Goede).

 - Use native backlight on some TongFang devices (Werner Sembach).

 - Drop X86 dependency from the ACPI backlight driver Kconfig (Riwen
   Lu).

 - Shorten the quirk list in the ACPI backlight driver by identifying
   Clevo by board_name only (Werner Sembach).

 - Remove useless NULL pointer checks from 2 ACPI PCI link management
   functions (Andrey Strachuk).

 - Fix obsolete example in the ACPI EINJ documentation (Qifu Zhang).

 - Update links and references to _DSD-related documents (Sudeep
   Holla).
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