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>
diff --git a/arch/arm/dts/rk3399-evb-u-boot.dtsi b/arch/arm/dts/rk3399-evb-u-boot.dtsi
index 20910e7..ccb33d3 100644
--- a/arch/arm/dts/rk3399-evb-u-boot.dtsi
+++ b/arch/arm/dts/rk3399-evb-u-boot.dtsi
@@ -5,3 +5,9 @@
 
 #include "rk3399-u-boot.dtsi"
 #include "rk3399-sdram-lpddr3-4GB-1600.dtsi"
+
+/ {
+	chosen {
+		u-boot,spl-boot-order = &sdhci, &sdmmc;
+	};
+};
diff --git a/arch/arm/dts/rk3399-evb.dts b/arch/arm/dts/rk3399-evb.dts
index a506e8d..8e887f3 100644
--- a/arch/arm/dts/rk3399-evb.dts
+++ b/arch/arm/dts/rk3399-evb.dts
@@ -15,8 +15,6 @@
 
 	chosen {
 		stdout-path = &uart2;
-		u-boot,spl-boot-order = \
-			&sdhci, &sdmmc;
 	};
 
 	vdd_center: vdd-center {