Patch merged into coreboot/master: 86127c7 libpayload: Clean up USB build warnings

the following patch was just integrated into master:
commit 86127c7bfe14e8b3f9e45de66d503102eafa654f
Author: Marc Jones 
Date:   Mon Dec 29 22:07:04 2014 -0700

libpayload: Clean up USB build warnings

There were a few build warnings in the USB driver to clean
    up before -Werror may be enabled.

Change-Id: I220cfcf0ee926912a184a91d3ced3ba61259130e
    Signed-off-by: Marc Jones 
    Reviewed-on: http://review.coreboot.org/7921
    Tested-by: build bot (Jenkins)
    Reviewed-by: Edward O'Callaghan

See http://review.coreboot.org/7921 for details.

-gerrit