uboot-phytec

rockchip: dts: rk3399-evb: move u-boot, spl-boot-order to to the u-boot.dtsi

The u-boot specific device tree directives should be in u-boot.dtsi

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>