Patch merged into coreboot/master: southbridge/amd/sb700: Fix random persistent SATA AHCI drive detection failure

the following patch was just integrated into master:
commit 876bdd4ab3591079d3ffa5b9b0fb6080098ea769
Author: Timothy Pearson 
Date:   Mon Jun 22 20:57:39 2015 -0500

southbridge/amd/sb700: Fix random persistent SATA AHCI drive detection failure

Change-Id: I4202a62217a7aaeaba07e4b994a350e83e064c9c
    Signed-off-by: Timothy Pearson 
    Reviewed-on: http://review.coreboot.org/12001
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/12001 for details.

-gerrit