Patch merged into coreboot/master: ef57a22 wtm2: Fix issues with USB in firmware

the following patch was just integrated into master:
commit ef57a22163519431dc0951f2ccc857f1027d7109
Author: Duncan Laurie 
Date:   Tue Jun 10 10:03:22 2014 -0700

wtm2: Fix issues with USB in firmware

XHCI driver was not enabled in libpayload and some ports were
    disabled that should be enabled.

The Chrome OS GPIOs also need to be reported as 0xFFFFFFFF to
    properly indicate unused so crossystem does not attempt to
    export GPIO number 255 in the kernel and trigger a warning.

BUG=chrome-os-partner:28234
    TEST=Build and boot on wtm2

Original-Change-Id: Ib5727ef6e618c959640b200757cfa13f95c7cb0f
    Original-CSigned-off-by: Duncan Laurie 
    Original-CReviewed-on: https://chromium-review.googlesource.com/203184
    Original-CReviewed-by: Aaron Durbin 
    (cherry picked from commit 328362469b00c9467908a7d18a031fee73753def)
    Signed-off-by: Marc Jones

Change-Id: I91ef865c44d3c73b0d74c9eaf1fbf2fb5e894434
    Reviewed-on: http://review.coreboot.org/8047
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

See http://review.coreboot.org/8047 for details.

-gerrit