[PATCH] sata_vsc: data_xfer should use mmio

Hi,

sata_vsc is an MMIO device, and should use the correct data_xfer
function.  This problem was introduced by:

   commit a6b2c5d4754dc539a560fdf0d3fb78a14174394a
   Author: Alan Cox <alan@lxorguk.ukuu.org.uk>
   Date:   Mon May 22 16:59:59 2006 +0100

        [PATCH] PATCH: libata. Add ->data_xfer method

Signed-off-by: Martin Hicks <mort@bork.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>