The early PIIX chips allowed only one non PIO0 timing at a time. This
makes them rather different to the later PIIX3+ devices so rather than
complicate the ata_piix driver with these considerations this adds a
driver explicitly for the early devices.

Currently this hardware is unsupported. The old IDE piix driver will
claim the chip but does not in fact know how to handle the lack of
independant slave/master timings, and scribbles on other registers not
used for IDE on this device.

Alan

Signed-off-by: Alan Cox <alan@redhat.com>

Suggested Kconfig entry

config SCSI_ATA_OLDPIIX
	tristate "Intel PIIX support"
	depends on SCSI_SATA && PCI
	help
	  This option enables support for the original Intel PIIX
	  IDE controller found on some older machines.

	  If unsure, say N.