mb/google/poppy: Add variant support for camera asl

This change adds infrastructure to allow variants to define their own
camera.asl file.
- Poppy and soraka use the one provided by baseboard.
- Dummy file is added for nautilus since it does not have camera
support enabled yet.

TEST=Verified that DSDT table remains the same with and without this
change.

Change-Id: I0f0b489e74739aa4708283d58d8b7626b77a89a3
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/22558
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: shkim <sh_.kim@samsung.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/poppy/dsdt.asl

@@ -49,9 +49,8 @@ DefinitionBlock(
 		}
 	}
 
-	/* MIPI camera */
-	#include "acpi/ipu_mainboard.asl"
-	#include "acpi/mipi_camera.asl"
+	/* Camera */
+	#include <variant/acpi/camera.asl>
 
 	/* Chrome OS specific */
 	#include <vendorcode/google/chromeos/acpi/chromeos.asl>

src/mainboard/google/poppy/variants/baseboard/include/baseboard/acpi/camera.asl

@@ -0,0 +1,17 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 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.
+ */
+
+#include "ipu_mainboard.asl"
+#include "mipi_camera.asl"

src/mainboard/google/poppy/variants/nautilus/include/variant/acpi/camera.asl

@@ -0,0 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 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.
+ */
+
+/* Dummy file until camera support is added. */

src/mainboard/google/poppy/variants/poppy/include/variant/acpi/camera.asl

@@ -0,0 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 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.
+ */
+
+#include <baseboard/acpi/camera.asl>

src/mainboard/google/poppy/variants/soraka/include/variant/acpi/camera.asl

@@ -0,0 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 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.
+ */
+
+#include <baseboard/acpi/camera.asl>