Patch merged into coreboot/master: a7778e0 libpayload/ahci: Fix a warning by decompartmentalise the AHCI driver.

the following patch was just integrated into master:
commit a7778e05d50dfc3dcfc08a7a421acdba6412d32c
Author: Edward O'Callaghan 
Date:   Thu Jan 23 08:30:42 2014 +1100

libpayload/ahci: Fix a warning by decompartmentalise the AHCI driver.

Decompartmentalise AHCI driver into two parts, ATA and ATAPI. Add a few
    superficial comments while here. This also fixes a compiler warning.

Change-Id: Ia1fd545b39868a81cbc311f6ffc786f9f1f61415
    Signed-off-by: Edward O'Callaghan

See http://review.coreboot.org/4783 for details.

-gerrit