rockchip: dts: rk3328: rock64: Add same-as-spl order

rk3328 can use same-as-spl option so next loaders are loaded from the same
medium.
Add the boot order in the rock64 dts otherwise booting from sdcard
will result in u-boot looking into the eMMC.

Signed-off-by: Emmanuel Vadot <manu@freebsd.org>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3328-rock64-u-boot.dtsi b/arch/arm/dts/rk3328-rock64-u-boot.dtsi
index 1d441f7..e5946d2 100644
--- a/arch/arm/dts/rk3328-rock64-u-boot.dtsi
+++ b/arch/arm/dts/rk3328-rock64-u-boot.dtsi
@@ -5,6 +5,11 @@
 
 #include "rk3328-u-boot.dtsi"
 #include "rk3328-sdram-lpddr3-1600.dtsi"
+/ {
+	chosen {
+		u-boot,spl-boot-order = "same-as-spl", &sdmmc, &emmc;
+	};
+};
 
 &usb_host0_xhci {
 	status = "okay";