ACPI updates for 4.18-rc1

These update the ACPICA code in the kernel to the 20180508 upstream
revision and make it support the RT patch, add CPPC v3 support to the
ACPI CPPC library, add a WDAT-based watchdog quirk to prevent clashes
with the RTC, add quirks to the ACPI AC and battery drivers, and
update the ACPI SoC drivers.

Specifics:

 - Update the ACPICA code in the kernel to the 20180508 upstream
   revision including:
   * iASL -tc option enhancement (Bob Moore).
   * Debugger improvements (Bob Moore).
   * Support for tables larger than 1 MB in acpidump/acpixtract
     (Bob Moore).
   * Minor fixes and cleanups (Colin Ian King, Toomas Soome).

 - Make the ACPICA code in the kernel support the RT patch (Sebastian
   Andrzej Siewior, Steven Rostedt).

 - Add a kmemleak annotation to the ACPICA code (Larry Finger).

 - Add CPPC v3 support to the ACPI CPPC library and fix two issues
   related to CPPC (Prashanth Prakash, Al Stone).

 - Add an ACPI WDAT-based watchdog quirk to prefer iTCO_wdt on
   systems where WDAT clashes with the RTC SRAM (Mika Westerberg).

 - Add some quirks to the ACPI AC and battery drivers (Carlo Caione,
   Hans de Goede).

 - Update the ACPI SoC drivers for Intel (LPSS) and AMD (APD)
   platforms (Akshu Agrawal, Hans de Goede).

 - Fix up some assorted minor issues (Al Stone, Laszlo Toth,
   Mathieu Malaterre).
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