cr50: Do not initialize ccd_testlab & usbpd_uart_routing by default.

BUG=none
TEST=manual
start servod on device that doesn't support ccd testlab facilities and
no longer see

ERROR - Unable to determine driver for usbpd_uart_routing
ERROR - Problem initializing cr50_testlab -> open :: Timeout waiting
for response.

Change-Id: Ib7fb5cd80d7d5821408be3ff25403677072868dd
Reviewed-on: https://chromium-review.googlesource.com/977026
Commit-Ready: Todd Broch <tbroch@chromium.org>
Tested-by: Todd Broch <tbroch@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
2 files changed