faft: Support tests running in EC WP'ed and add a new test suite for them

In order to check EC WP behavior, we enables EC WP at the beginning of tests,
runs the same tests on normal mode, and restores the original EC WP state.

This new test suite (suite:faft_ec_wp) now contains all faft_lv1 and faft_lv2
test cases.

BUG=chrome-os-partner:15835
TEST=run_remote_tests --board link --remote dut suite:faft_ec_wp

Change-Id: I91096d463ce8ad0503e021b5d81b53a3d95116dc
Reviewed-on: https://gerrit.chromium.org/gerrit/38114
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>
11 files changed