arm64: dts: rockchip: add initial dts support for Rockpro64

Rockpro64 is a rockchip RK3399 based board from pine64.org.
This patch adds basic device node support for Rockpro64 board and make it able
to bring up.

Peripheral Works
- Sdcard
- USB 2.0, 3.0
- Leds
- Ethernet
- Debug console

Not working:
- USB Type-C
Signed-off-by: Akash Gajjar <Akash_Gajjar@mentor.com>
Acked-by: Deepak Das <Deepak_Das@mentor.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.txt

@@ -168,6 +168,10 @@ Rockchip platforms device tree bindings
     Required root node properties:
     - compatible = "pine64,rock64", "rockchip,rk3328";
 
+- Pine64 RockPro64 board:
+    Required root node properties:
+    - compatible = "pine64,rockpro64", "rockchip,rk3399";
+
 - Rockchip PX3 Evaluation board:
     Required root node properties:
       - compatible = "rockchip,px3-evb", "rockchip,px3", "rockchip,rk3188";

arch/arm64/boot/dts/rockchip/Makefile

@@ -17,5 +17,6 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-gru-kevin.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-puma-haikou.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-roc-pc.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-rock960.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-rockpro64.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-sapphire.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-sapphire-excavator.dtb