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>

arch/arm/Kconfig

@@ -840,14 +840,12 @@ config STM32
 
 config ARCH_ROCKCHIP
 	bool "Support Rockchip SoCs"
-	select SUPPORT_SPL
-	select SPL
 	select OF_CONTROL
 	select BLK
 	select DM
-	select SPL_DM
+	select SPL_DM if SPL
 	select SYS_MALLOC_F
-	select SPL_SYS_MALLOC_SIMPLE
+	select SPL_SYS_MALLOC_SIMPLE if SPL
 	select DM_GPIO
 	select DM_I2C
 	select DM_MMC