roc-pc-rk3399: Enable SPI Flash

Enable winbond SPI flash for ROC-PC-RK3399 board.
Signed-off-by: NJagan Teki <jagan@amarulasolutions.com>
Reviewed-by: NKever Yang <kever.yang@rock-chips.com>

arch/arm/dts/rk3399-roc-pc-u-boot.dtsi

@@ -7,6 +7,10 @@
 #include "rk3399-sdram-lpddr4-100.dtsi"
 
 / {
+	aliases {
+		spi0 = &spi1;
+	};
+
 	chosen {
 		u-boot,spl-boot-order = "same-as-spl", &sdhci, &sdmmc;
 	};

configs/roc-pc-rk3399_defconfig

@@ -42,6 +42,8 @@ CONFIG_RAM_RK3399_LPDDR4=y
 CONFIG_BAUDRATE=1500000
 CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_SYSRESET=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_ROCKCHIP_SPI=y
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_DWC3=y