All USB ports need to be routed through XHCI, so
remove UHCI and EHCI stacks (will also reduce binary size
of depthcharge)
BUG=chrome-os-partner:23396
TEST=Boot into dev mode screen, use keyboard and see that it works.
BRANCH=none
Change-Id: I05c56657f16c459294c0e9ceff339fe7a8e03ca2
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://chromium-review.googlesource.com/173579
Reviewed-by: Julius Werner <jwerner@chromium.org>
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>