ACPI updates for 4.17-rc1 - Update the in-kernel ACPICA code to upstream revision 20180313 including: * Module-level AML code handling fixes and simplifications (Bob Moore, Erik Schmauss). * Fixes and cleanups related to messaging (Bob Moore). * Events handling fixes related to disabling and enabling GPEs (Erik Schmauss). * Introduction of SPDX license identifiers and removal of license boilerplate in multiple files (Erik Schmauss). * Assorted fixes and cleanups (Bob Moore, Erik Schmauss, Hans de Goede, Seunghun Han). - Add new basic driver for the ACPI Time and Alarm Device (Rafael Wysocki). - Modify the ACPI battery driver to support battery thresholds on Lenovo ThinkPads (Ognjen Galic, Colin Ian King). - Avoid reporting battery capacity over 100 in the ACPI battery driver in some cases (Laszlo Toth). - Make the kernel recognize an OEM _OSI string from Dell to avoid power management issues with NVidia GPUs in Dell platforms (Alex Hung). - Make the PCI IRQ management code handle missing _PRS cleanly (Alex Hung). - Fix uevent notifications related to device hotplut (Lee, Chun-Yi). - Prevent the ACPI PAD driver from leaking memory (Lenny Szubowicz). - Update the ACPI CPPC library code to include subspace IDs in the kernel messages logged by it (George Cherian). - Add backlight quirk for Samsung 670Z5E (Hans de Goede). - Add the NFIT and HMAT tables to the list of ACPI tables that can be overridden via initrd (Dan Williams). - Fix and clean up some ACPI documentation and Kconfig help language (Aishwarya Pant, Randy Dunlap). - Replace license boilerplate with an SPDX license ID in the ACPI PMIC operation region handling code (Rajmohan Mani).