google/slippy: clean up NGI and move to libgfxinit

- remove old, buggy NGI code from falco/peppy variants
- remove superfluous INTEL_DP/INTEL_DDI configs, since already
selected by northbridge/haswell
- always use libgfxinit when use native init config selected
- enable NGI/libgfxinit for all slippy variants

The reset of the old Haswell NGI code will be cleaned up in
a subsequent patchset.

Test: select MAINBOARD_DO_NATIVE_VGA_INIT, observe panel init
using SeaBIOS and Tianocore payloads on peppy, wolf variants

Change-Id: Id5727cad7f714ffa57e77e2a25505e3c28f55237
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/18824
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>

1 files changed, 0 insertions, 21 deletions

diff --git a/src/mainboard/google/slippy/variants/peppy/include/variant/mainboard.h b/src/mainboard/google/slippy/variants/peppy/include/variant/mainboard.h
deleted file mode 100644
index 6329a27805..0000000000
--- a/src/mainboard/google/slippy/variants/peppy/include/variant/mainboard.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
-* This file is part of the coreboot project.
-*
-* Copyright 2013 Google Inc.
-*
-* This program is free software; you can redistribute it and/or modify
-* it under the terms of the GNU General Public License as published by
-* the Free Software Foundation; version 2 of the License.
-*
-* This program is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-* GNU General Public License for more details.
-*/
-
-#ifndef __MAINBOARD_H_
-#define __MAINBOARD_H_
-void mainboard_train_link(struct intel_dp *intel_dp);
-void mainboard_set_port_clk_dp(struct intel_dp *intel_dp);
-
-#endif