autotest: servo: Set keyboard mux before enabling keyboard control

Enabling keyboard control before setting keyboard mux causes unwanted
key presses for a short moment. Let's enable keyboard after to avoid
this.

BUG=chrome-os-partner:15547
TEST=Passed firmware_FAFTSetup.

Change-Id: I134a3ad3d2a72c906224d9db5589b582e13e3806
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/37201
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
1 file changed