arm: dts: rockchip: move all rk322x u-boot specific properties in separate dtsi files

In order to sync rk322x.dtsi from Linux, move all
U-boot specific properties in separate dtsi files.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3229-evb-u-boot.dtsi b/arch/arm/dts/rk3229-evb-u-boot.dtsi
new file mode 100644
index 0000000..b65149c
--- /dev/null
+++ b/arch/arm/dts/rk3229-evb-u-boot.dtsi
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk322x-u-boot.dtsi"
+
+/ {
+	chosen {
+		stdout-path = &uart2;
+	};
+};
+
+&dmc {
+	rockchip,pctl-timing = <0x96 0xC8 0x1F3 0xF 0x8000004D 0x4 0x4E 0x6 0x3
+		0x0 0x6 0x5 0xC 0x10 0x6 0x4 0x4
+		0x5 0x4 0x200 0x3 0xA 0x40 0x0 0x1
+		0x5 0x5 0x3 0xC 0x1E 0x100 0x0 0x4
+		0x0 0x924>;
+	rockchip,phy-timing = <0x220 0x1 0x0 0x0 0x0 0x4 0x60>;
+	rockchip,sdram-params = <0x428B188 0x0 0x21 0x472 0x15
+		0 300 3 0 120>;
+};
+
+&emmc {
+	u-boot,dm-pre-reloc;
+};
+
+&uart2 {
+	u-boot,dm-pre-reloc;
+};