Patch merged into coreboot/master: libpayload: usb: handle situation with no free device address

the following patch was just integrated into master:
commit b5623dede7569cf74dd865748d17b0e413c03ee2
Author: Patrick Georgi 
Date:   Wed Jan 4 22:22:56 2017 +0100

libpayload: usb: handle situation with no free device address

Change-Id: I1308bdca90f1a09d980f384ee85552198a39b965
    Signed-off-by: Patrick Georgi 
    Found-by: Coverity Scan #1260940
    Reviewed-on: https://review.coreboot.org/18036
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/18036 for details.

-gerrit