his patch adds VT6421 PATA support to sata_via.

If we don't want to enable PATA support, nothing is changed in sata_via 
driver:

<M> VIA SATA support
      [ ]   VT6421 PATA support (HIGHLY EXPERIMENTAL)


The patch is based on the patch from VIA, it applies to 2.6.19.


-- 
Tomasz Chmielewski
http://wpkg.org