ARM64: rockchip: add support for rk3399 SoC based evb

RK3399 is a SoC from Rockchip with dual-core Cortex-A72
and quad-core Cortex-A53 CPU. It supports two USB3.0
type-C ports and two USB2.0 EHCI ports. Other interfaces
are very much like RK3288, the DRAM are 32bit width address
and support address from 0 to 4GB-128MB range.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/board/rockchip/evb_rk3399/Kconfig b/board/rockchip/evb_rk3399/Kconfig
new file mode 100644
index 0000000..412b81c
--- /dev/null
+++ b/board/rockchip/evb_rk3399/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_EVB_RK3399
+
+config SYS_BOARD
+	default "evb_rk3399"
+
+config SYS_VENDOR
+	default "rockchip"
+
+config SYS_CONFIG_NAME
+	default "evb_rk3399"
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+
+endif