faft: Change the order of setup_dev_mode() and setting dut_sees_usbkey

In the keyboard controlled dev mode, the dev mode switching method may
plug out the USB disk from DUT. It changes the original USB plug in/out
setting. So we should set the USB plug in/out after setup_dev_mode().

BUG=chrome-os-partner:11694
TEST=DUT in normal mode, run firmware_RecoveryButton/control.dev passed.

Change-Id: If1461b94994ed1a7e2eff7a9023e77e40f28be4a
Reviewed-on: https://gerrit.chromium.org/gerrit/28466
Reviewed-by: Vic Yang <victoryang@chromium.org>
Commit-Ready: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
9 files changed