Sync ACPICA with Intel's version 20140828.

* Add support for runtime validation of the _DSD package.

* Add the GICC affinity subtable to the SRAT table.

* Add error detection for illegally named references within control
    methods that would cause runtime failures.

* Add error checking for dependencies related to the _PSx power
    methods.

* Various improvements, bug fixes and cleanups.

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