Please test stg driver

[non at ever.sanda.gr.jp]

I would like to MFC the AHA-2920/2910 support.
Since I don't have any of TMC18C30 (ISA), TMC18C30 based PC-Cards, nor
AHA-2910/2920. Could someone test the following  with -stable and
confirm it would not break any support of the ISA card and the
PC-Cards, and adds support for AHA-2910/2920 ?

The patch and additional files are following:

http://www.sanda.gr.jp/non/stg.diff
http://www.sanda.gr.jp/non/files.tar.gz

// Noriaki Mitsunaga //