New NIC driver: sis190

[Alexander Pohoyda]

I have fixed some minor issues so that it works on FreeBSD 7.0 now (tested with amd64 build)

    http://pohoyda.gmxhome.de/sis190-freebsd-7.tar.gz

Please have a look and comment if there are obvious problems.  Otherwise, I would appreciate if the driver were accepted into the tree.  Thank you!

-- 
Alexander Pohoyda <alexander.pohoyda at gmx.net>
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