purism/librem_bdw: hook up libgfxinit

Test: build/boot Librem 13v1, 15v2 with libgfxinit

Change-Id: Ia108314b6ab9a01e898e1a8b0022aa4a0d8788be
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36108
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/purism/librem_bdw/Kconfig

@@ -6,6 +6,7 @@ config BOARD_PURISM_BASEBOARD_LIBREM_BDW
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
 	select INTEL_INT15
+	select MAINBOARD_HAS_LIBGFXINIT
 	select SOC_INTEL_BROADWELL
 
 if BOARD_PURISM_BASEBOARD_LIBREM_BDW

src/mainboard/purism/librem_bdw/Makefile.inc

@@ -16,3 +16,5 @@
 romstage-y += gpio.c
 romstage-y += variants/$(VARIANT_DIR)/pei_data.c
 ramstage-y += variants/$(VARIANT_DIR)/pei_data.c
+
+ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads

src/mainboard/purism/librem_bdw/gma-mainboard.ads

@@ -0,0 +1,28 @@
+--
+-- This file is part of the coreboot project.
+--
+-- 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; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- 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.
+--
+
+with HW.GFX.GMA;
+with HW.GFX.GMA.Display_Probing;
+
+use HW.GFX.GMA;
+use HW.GFX.GMA.Display_Probing;
+
+private package GMA.Mainboard is
+
+   ports : constant Port_List :=
+     (Internal,
+      HDMI1,
+      others => Disabled);
+
+end GMA.Mainboard;