arm64: dts: rockchip: add dts file for RK3399 evaluation board

This patch add rk3399-evb.dts for RK3399 evaluation board.
Tested on RK3399 evb.

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index df37865..7037a16 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -1,6 +1,7 @@
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3368-evb-act8846.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3368-geekbox.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3368-r88.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-evb.dtb
 
 always		:= $(dtb-y)
 subdir-y	:= $(dts-dirs)