Summary:  Add support for Sigmatel STAC9202/9250/9251 codecs.

        This patch adds support for Gateway laptops based on the
        Sigmatel STAC9250 codecs, as well as basic support for
        STAC9202/9250/9251 codecs.  Some Gateway systems require
        probe_mask=1 to work.  More work to be done prior to alsa 1.0.14
        final.


Signed off by Tobin Davis <tdavis@dsl-only.net>