Patch merged into coreboot/master: e8eb86f libpayload: Add in a missing "static".

the following patch was just integrated into master:
commit e8eb86f570723cc6becf7712b815c41e305bee5a
Author: Gabe Black 
Date:   Wed Sep 18 05:37:20 2013 -0700

libpayload: Add in a missing "static".

The readwrite_chunk was private to the usb mass storage driver, but wasn't
    marked as static which was upsetting the compiler.

Change-Id: I0ef5c5f96a29f793dd43ff672a939902bad13c45
    Signed-off-by: Gabe Black 
    Reviewed-on: https://chromium-review.googlesource.com/169816
    Reviewed-by: Julius Werner 
    Commit-Queue: Gabe Black 
    Tested-by: Gabe Black 
    (cherry picked from commit 8140e6145b3d072b7f12a924418570022207c065)
    Signed-off-by: Isaac Christensen 
    Reviewed-on: http://review.coreboot.org/6648
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel 
    Reviewed-by: Ronald G. Minnich

See http://review.coreboot.org/6648 for details.

-gerrit