More ACPI updates for v4.13-rc1 - Fix the ACPI code handling the SPCR table to check access width of MMIO regions and add a workaround for APM X-Gene 8250 UART to use 32-bit MMIO accesses with its register (Loc Ho). - Fix two ACPI-based hotplug issues related to the handling of hot-remove failures on the OS side (Chun-Yi Lee). - Constify attribute_group structures in a few places (Arvind Yadav). - Make one local function static (Colin Ian King).