[coreboot-gerrit] Patch merged into coreboot/master: southbridge/amd/sb700: Recover if AHCI disk detection fails

the following patch was just integrated into master:
commit 5260a44a96cec56c90aa16e9141874a5c9e7f759
Author: Timothy Pearson 
Date:   Mon Jun 22 02:21:29 2015 -0500

southbridge/amd/sb700: Recover if AHCI disk detection fails

The SB700 silicon is somewhat buggy; if the links come up in an
    incorrect state after POR the silicon cannot automatically recover.

If a disk fails to come online, reset the associated link and try
    disk detection again.

Change-Id: I29051af5eca5d31b6aecc261e9a48028380eccb3
    Signed-off-by: Timothy Pearson 
    Reviewed-on: http://review.coreboot.org/11999
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/11999 for details.

-gerrit