omap-panel-tpo-td028ttec1 - add missing include

This should have been part of:

commit 2c66fb17301ce824999f40ac4e6642ef1a61ba39
Author: Marek Belisko <marek.belisko@open-nandra.com>
Date:   Wed Jul 17 23:24:19 2013 +0200

Signed-off-by: NeilBrown <neilb@suse.de>