storm: invert dev_mode control

To keep dev mode switch consistent with other GPIOs (asserted low) -
invert dev_mode control on storm.

BUG=none
TEST=with the updated file dut-control properly reports the dev switch state.

Change-Id: I3949cbac106cba07a4b005ed9b84df30b83e7586
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/217140
Reviewed-by: Todd Broch <tbroch@chromium.org>
1 file changed