lynxpoint: Export pch_enable_lpc() for SuperIO systems

In order to enable a SuperIO in non ChromeEC systems we
need to make pch_enable_lpc() available to the mainboard
romstage.c

BUG=none
BRANCH=none
TEST=boot ChromeOS on Beltino

Change-Id: I34e7d23012e1852c69e82ba7cdc81a05751846de
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://chromium-review.googlesource.com/172180
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>
2 files changed