Patch merged into coreboot/master: ba22e4c libpayload: Fix some missing-prototype warnings

the following patch was just integrated into master:
commit ba22e4c3fde49b48bd711da6ad972738468ed181
Author: Nico Huber 
Date:   Fri Nov 23 11:34:20 2012 +0100

libpayload: Fix some missing-prototype warnings

usb_controller_initialize() is not declared in any header file nor
    called from outside of usbinit.c, so make it static.

set_configuration() looks like beeing non-static on purpose (like the
    other helpers around it in usb.c), so put a prototype into usb.h.

Change-Id: I08d93b3769d8398bb43462d9afdfeec81fef93ec
    Signed-off-by: Nico Huber 
    Reviewed-on: http://review.coreboot.org/1894
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

Reviewed-By: Patrick Georgi  at Fri Nov 23 15:11:37 2012, giving +2
See http://review.coreboot.org/1894 for details.

-gerrit