arm64: dts: rk3399-puma: Move u-boot properties into -u-boot.dtsi

Move U-Boot specific properties into rk3399-puma u-boot
specific dtsi file.

This would help to sync the devicetrees from Linux whenever
required instead of adding specific nodes.

Cc: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3399-puma-u-boot.dtsi b/arch/arm/dts/rk3399-puma-u-boot.dtsi
index 52f62b5..e664779 100644
--- a/arch/arm/dts/rk3399-puma-u-boot.dtsi
+++ b/arch/arm/dts/rk3399-puma-u-boot.dtsi
@@ -22,3 +22,19 @@
        };
 
 };
+
+&bios_enable {
+	u-boot,dm-pre-reloc;
+};
+
+&gpio1 {
+	u-boot,dm-pre-reloc;
+};
+
+&gpio3 {
+	u-boot,dm-pre-reloc;
+};
+
+&spiflash {
+	u-boot,dm-pre-reloc;
+};