kernel: Sync ACPICA with Intel's version 20140214.

kernel: Sync ACPICA with Intel's version 20140214.

Module changes:

* Implemented a new mechanism to proactively prevent problems with
  ill-behaved reentrant control methods that create named ACPI objects.
  It should allow serialization of methods without leading to
  AE_ALREADY_EXISTS exceptions if the method was actually entered by
  more than one thread.

* Added the "Windows 2013" string to the _OSI support.

* Hardened/updated the _PRT return value auto-repair code.

* Added support to avoid the possibility of infinite loops when
  traversing object linked lists.

* Add #pragma pack({push,pop}) to ensure that ACPICA headers are
  independent of compiler settings or host headers.

Utilities changes:

* iasl(8): Fix a problem with support for the SPMI table. The first
    reserved field was incorrectly forced to have a value of zero
    instead of one.

* iasl(8): Removed the obsolete -g option.

* acpiexec(8): Added missing support for "Extra" and "Data" subobjects
    and for diplaying entire object linked lists.

For a more detailed list, see sys/contrib/dev/acpica/changes.txt.

As of this commit, the hw.acpi.serialize_methods tunable (0 by default)
is replaced with hw.acpi.auto_serialize_methods (1 by default). Users
with the former tunable set to 1 in their loader.conf should therefore
not experience any differences.