Merge branches 'acpi-scan', 'acpi-pci', 'acpi-tad' and 'acpi-apei'

Merge an ACPI device enumeration core code update, ACPI support updates
related to PCI, an ACPI Time and Alarm Device (TAD) driver update and
ACPI APEI updates for 7.3-rc1:

 - Avoid registering platform devices with resource overlaps in the ACPI
   core device enumeration code (Rafael Wysocki)

 - Clear driver_data on all paths that free acpi_pci_root in
   acpi_pci_root_add() (Chen Pei)

 - Simplify acpi_get_pci_dev() with the help of a mutex guard, introduce
   acpi_dev_get_pci_dev() for code that has a struct ACPI device for
   which it wants to get the struct pci_dev pointer of the associated
   PCI device, and use it in the ACPI video bus driver (Rafael Wysocki)

 - Avoid printing confusing _OSC messages for non-PCIe host bridges
   without _OSC which is a valid configuration (Kazuma Kondo)

 - Add locking around evaluation of ACPI control methods in the ACPI TAD
   driver to avoid race conditions (Rafael Wysocki)

 - Handle repeated SEA error storms in APEI (Junhao He)

 - Fix ERST timeout unit conversion in APEI (Nirmoy Das)

 - Fix ARM section length accounting after header in the ACPI APEI GHES
   driver (TanZheng)

 - Mark ghes_in_nmi_spool_from_list() as maybe unused (Rui Qi)

* acpi-scan:
  ACPI: scan: Avoid registering platform devices with resource overlaps

* acpi-pci:
  ACPI: PCI: Avoid misleading _OSC messages for non-PCIe host bridges without _OSC
  ACPI: video: Use acpi_dev_get_pci_dev() instead of acpi_get_pci_dev()
  ACPI: video: Drop backlight parent device reference later
  ACPI: PCI: Introduce acpi_dev_get_pci_dev()
  ACPI: PCI: Use a mutex guard to simplify acpi_get_pci_dev()
  ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root

* acpi-tad:
  ACPI: TAD: Add locking around AML evaluations

* acpi-apei:
  ACPI: APEI: Handle repeated SEA error storms
  ACPI: APEI: Fix ERST timeout unit conversion
  ACPI: APEI: GHES: fix ARM section length accounting after header
  ACPI: APEI: GHES: Mark ghes_in_nmi_spool_from_list() as maybe unused