ARM: dts: rockchip: Add rk3588j-u-boot.dtsi

Add rk3588j-u-boot.dtsi for adding U-Boot specific nodes and
properties for Rockchip RK3588J SoC.

Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3588j-u-boot.dtsi b/arch/arm/dts/rk3588j-u-boot.dtsi
new file mode 100644
index 0000000..f5c9e32
--- /dev/null
+++ b/arch/arm/dts/rk3588j-u-boot.dtsi
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2022 Edgeble AI Technologies Pvt. Ltd.
+ */
+
+#include "rk3588-u-boot.dtsi"