Add VIA_SATA_PATA flag for cx700, vx800 and vx855 chipsets
(the first port is SATA).

Based on commits 7585eb1b, bfce5e01 and e4d866cd for pata_via
host driver.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>