ARM: dts: meson-g12a: add U-Boot specific DT for graphics

Like the meson-gx support, add the U-Boot specific bits in DT
to support graphics on G12A SoCs.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
diff --git a/arch/arm/dts/meson-g12a-sei510-u-boot.dtsi b/arch/arm/dts/meson-g12a-sei510-u-boot.dtsi
new file mode 100644
index 0000000..fddffd6
--- /dev/null
+++ b/arch/arm/dts/meson-g12a-sei510-u-boot.dtsi
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2019 BayLibre, SAS.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include "meson-g12a-u-boot.dtsi"