firmware_ECThermal: stop userspace thermal loop before testing

Userspace thermal loop interferes with EC internal thermal loop. Let's
disable it before testing.

BUG=chrome-os-partner:11714
TEST=Test passed. See 'Stopped temp_metrics' in the log.

Change-Id: Ibc6c8c026319c38799d291e0960d6c71ba9534b0
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/36895
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed