Patch merged into coreboot/master: a2adaeb usbdebug: Only test two possible USB device numbers

the following patch was just integrated into master:
commit a2adaeb68cdecc2bc1185613a11b7d49915883ec
Author: Kyösti Mälkki 
Date:   Mon Aug 12 00:09:21 2013 +0300

usbdebug: Only test two possible USB device numbers

After an USB device sees USB bus reset on the bus, it will reset to
    device number 0. Per the EHCI debug port specification, a debug
    dongle device may reset to the fixed debug device number of 127 instead.
    Thus there is no need to try device numbers from 1 to 126.

Do a sanity-check on a returned debug descriptor as I experienced
    some USB flash memory to respond on this request with zero-fill data.

Change-Id: I78d58f3dc049cd8c20c6e2aa3a4207ad7e6a6d33
    Signed-off-by: Kyösti Mälkki 
    Reviewed-on: http://review.coreboot.org/3861
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See http://review.coreboot.org/3861 for details.

-gerrit