[PATCH] libata: Marvell SATA support (PIO mode)

This is my libata compatible low level driver for the Marvell SATA
family.  Currently it successfully runs in PIO mode on a 6081 chip.
EDMA support is in the works and should be done shortly.  Review,
testing (especially on other flavors of Marvell), comments welcome.

Signed-off-by: Brett Russ <russb@emc.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>