ata: align ata command defines with kernel ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ata: split ide sff suport to separate file ...

Currently we only support oldschool IDE SFF devices. This is done
by registering a register layout struct and everything else is done
by the generic IDE SFF driver. Since modern ATA devices still use
ATA, but not the SFF interface anymore, split out the IDE SFF support
to a separate file to allow for other types of ata interfaces.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ATA Disk Support: Add support for native ATA type drives ...

This changed patch removes more of the u-boot like code and replace it with
kernel like code.

commit 2a89669
Author: Juergen Beisert <jbe@pengutronix.de>
Date:   Fri Sep 30 15:06:26 2011 +0200

    ATA Disk Support: Add support for native ATA type drives

    Signed-off-by: Juergen Beisert <jbe@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>