mec1322: bugfix for flash_ec dut-control call.
mec1322: bugfix for flash_ec dut-control call.

Direct call to shell command 'dut-control' wouldn't account for port
argument in script.  Change to function 'dut_control' within script
that does.

Signed-off-by: Todd Broch <035f5b1f817cbb94019cec357b99778115602b63@chromium.org>

BRANCH=none
BUG=none
TEST=none

Change-Id: Id4f77dedb57ce8097059c33371b5cd697fdbdb0d
Reviewed-on: https://chromium-review.googlesource.com/276534
Reviewed-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>
Commit-Queue: Todd Broch <035f5b1f817cbb94019cec357b99778115602b63@chromium.org>
Tested-by: Todd Broch <035f5b1f817cbb94019cec357b99778115602b63@chromium.org>

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