haswell: Enable LTE module in S0
haswell: Enable LTE module in S0

Note that the PP3300_LTE_EN signal does different things on
different boards. On peppy/slippy it controls both LTE power
and gates a wake interrupt to the PCH. On falco it just gates
the wake interrupt; module power is tied to the DX rail.

On all boards there is a separate DISABLE_L signal from the PCH.

BUG=chrome-os-partner:20513
BRANCH=falco,peppy
TEST=Manual. Verify module detectable via lsusb in S0. Verify power
to module is disabled in S3.

Signed-off-by: Dave Parker <a0cbe8131c36e5e74e2155ca4ce91517847db706@chromium.org>

Change-Id: I4984081009e4a1ce8ad8996e97f779c545829ce5
Reviewed-on: https://gerrit.chromium.org/gerrit/60941
Reviewed-by: Aaron Durbin <af0622ab041e8b0f8e5819838dcc93898196e71f@chromium.org>
Commit-Queue: Dave Parker <a0cbe8131c36e5e74e2155ca4ce91517847db706@chromium.org>
Tested-by: Dave Parker <a0cbe8131c36e5e74e2155ca4ce91517847db706@chromium.org>

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