Patch merged into coreboot/master: 4e52072 libpayload: Better error detection in USB mass storage

the following patch was just integrated into master:
commit 4e520725dd227ade37be9274ac499671e50e7b93
Author: Nico Huber 
Date:   Mon May 21 14:05:41 2012 +0200

libpayload: Better error detection in USB mass storage

This implements status transport (CSW) more closely to the standard
    (usbmassbulk_10).

Change-Id: Ife516316e054d4e87ebe698dc487eeb9ebcfd38d
    Signed-off-by: Nico Huber

Build-Tested: build bot (Jenkins) at Wed Jun 20 19:31:59 2012, giving +1
Reviewed-By: Peter Stuge  at Wed Jun 20 17:27:03 2012, giving +2
See http://review.coreboot.org/1072 for details.

-gerrit