rockpro-rk3399: Enable SPI Flash

Enable winbond SPI flash for ROC-PC-RK3399 board.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3399-rockpro64-u-boot.dtsi b/arch/arm/dts/rk3399-rockpro64-u-boot.dtsi
index 4648513..deaa3ef 100644
--- a/arch/arm/dts/rk3399-rockpro64-u-boot.dtsi
+++ b/arch/arm/dts/rk3399-rockpro64-u-boot.dtsi
@@ -6,6 +6,10 @@
 #include "rk3399-u-boot.dtsi"
 #include "rk3399-sdram-lpddr4-100.dtsi"
 / {
+	aliases {
+		spi0 = &spi1;
+	};
+
 	chosen {
 		u-boot,spl-boot-order = "same-as-spl", &sdmmc, &sdhci;
 	};