Patch merged into coreboot/master: a00f983 libpayload: ahci: Fix command engine shutdown

the following patch was just integrated into master:
commit a00f9830fb58d3f5061aab71be8553f3ff2e1f70
Author: Nico Huber 
Date:   Mon Jun 17 17:47:24 2013 +0200

libpayload: ahci: Fix command engine shutdown

A timeout while waiting for a device' signature has shown that our
    error path wasn't correct. The shutdown of the ports command engine
    always timed out. Fix that by waiting for FR (FIS Receive Running)
    to be cleared independently from CR (Command List Running) and after
    clearing FRE (FIS Receive Enable).

Change-Id: I50edf426ef0241424456f1489a7fc86a2cfc5753
    Signed-off-by: Nico Huber 
    Reviewed-on: http://review.coreboot.org/3494
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel 
    Reviewed-by: Marc Jones 
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/3494 for details.

-gerrit