samus: Remove WWAN GPIO by default
samus: Remove WWAN GPIO by default

Leave this rail off by default to help with EMI.

BUG=chrome-os-partner:34117
BRANCH=samus
TEST=build and boot on samus

Signed-off-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/234405
Reviewed-by: Alec Berg <alecaberg@chromium.org>
(cherry picked from commit 8decf722c52cd03681d4c6a900722a11388b59f3)
Signed-off-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>

Change-Id: I6a2aa7da0acd86636aa9421891959e76b6c37415
Reviewed-on: https://chromium-review.googlesource.com/235747
Tested-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Reviewed-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Commit-Queue: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Trybot-Ready: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>

thehobn/ec,thehobn/ec,thehobn/ec,thehobn/ec