mb/google/brya: Add new baseboard nissa with variants nivviks and nereid

Add a new baseboard for nissa, an Intel ADL-N based reference design.
Also, add variants for the two reference boards, nivviks and nereid.
This commit is a stub which only adds the minimum code needed for a
successful build.

BUG=b:197479026
TEST=abuild -a -x -c max -p none -t google/brya -b nivviks
     abuild -a -x -c max -p none -t google/brya -b nereid

Change-Id: I2a3975fb7a45577fec8ea7c6c9f6ea042ab8cba5
Signed-off-by: Reka Norman <rekanorman@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60271
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/src/mainboard/google/brya/variants/nereid/include/variant/ec.h b/src/mainboard/google/brya/variants/nereid/include/variant/ec.h
new file mode 100644
index 0000000000..7a2a6ff8b7
--- /dev/null
+++ b/src/mainboard/google/brya/variants/nereid/include/variant/ec.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __VARIANT_EC_H__
+#define __VARIANT_EC_H__
+
+#include <baseboard/ec.h>
+
+#endif
diff --git a/src/mainboard/google/brya/variants/nereid/include/variant/gpio.h b/src/mainboard/google/brya/variants/nereid/include/variant/gpio.h
new file mode 100644
index 0000000000..c4fe342621
--- /dev/null
+++ b/src/mainboard/google/brya/variants/nereid/include/variant/gpio.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef VARIANT_GPIO_H
+#define VARIANT_GPIO_H
+
+#include <baseboard/gpio.h>
+
+#endif