arm64: dts: meson: g12: add a g12 layer

While the sm1 is very close to the g12a/b family, somethings apply
differently on the g12a/b and not the sm1. This introduce a new layer
of dtsi for part which apply to the g12a and g12b but not the sm1.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-g12.dtsi

+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2019 BayLibre, SAS
+ * Author: Jerome Brunet <jbrunet@baylibre.com>
+ */
+
+#include "meson-g12-common.dtsi"

arch/arm64/boot/dts/amlogic/meson-g12a.dtsi

@@ -3,7 +3,7 @@
  * Copyright (c) 2018 Amlogic, Inc. All rights reserved.
  */
 
-#include "meson-g12-common.dtsi"
+#include "meson-g12.dtsi"
 #include <dt-bindings/power/meson-g12a-power.h>
 
 / {

arch/arm64/boot/dts/amlogic/meson-g12b.dtsi

@@ -4,7 +4,7 @@
  * Author: Neil Armstrong <narmstrong@baylibre.com>
  */
 
-#include "meson-g12-common.dtsi"
+#include "meson-g12.dtsi"
 #include <dt-bindings/power/meson-g12a-power.h>
 
 / {