mb/google/fizz: Use variant-specific gma-mainboard.ads files

The karma variant, being a Chromebase, has an internal eDP output for
the built-in display whereas the fizz/endeavour variants do not. Use
separate gma-mainboard.ads files so that karma's internal panel works
properly with libgfxinit.

TEST=build google/fizz (fizz/karma) with libgfxinit enabled, ensure
correct gma-mainboard.ads file is included in the build.

Change-Id: Ia6aca538ba8c13b48aa80901222071d704b5f0c0
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81901
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/google/fizz/Makefile.mk

@@ -11,7 +11,7 @@ ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC) += ec.c
 ramstage-y += mainboard.c
 
-ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
+ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += variants/$(VARIANT_DIR)/gma-mainboard.ads
 
 subdirs-y += variants/baseboard
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/baseboard/include

src/mainboard/google/fizz/variants/fizz/gma-mainboard.ads

@@ -0,0 +1,18 @@
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
+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 :=
+     (DP1,
+      DP2,
+      HDMI1,
+      HDMI2,
+      others => Disabled);
+
+end GMA.Mainboard;

src/mainboard/google/fizz/variants/karma/gma-mainboard.ads

@@ -0,0 +1,19 @@
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
+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 :=
+     (eDP,
+      DP1,
+      DP2,
+      HDMI1,
+      HDMI2,
+      others => Disabled);
+
+end GMA.Mainboard;