ata_piix sata support - patch for 2.4.27

[Larry Lindsey <larry.the.pirate@gmail.com>]

I've produced a patch against the Debian 2.4.27 sources, which adds
ata_piix support (ICH6, ICH7).  A lot of Dell machines use this
chipset.  Its pretty klugey, but I hope its useful.

http://www.math.gatech.edu/~lindsey/libata-piix-2.4.27.patch.tar.bz2
http://www.math.gatech.edu/~lindsey/libata-piix-2.4.27.patch.deb

-Larry