rockchip: Enable building a SPI ROM image on bob

Add a simple binman config and enable CONFIG_HAS_ROM so that U-Boot
produces a ROM for bob.
Signed-off-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/rk3399-gru-u-boot.dtsi

@@ -4,3 +4,7 @@
  */
 
 #include "rk3399-u-boot.dtsi"
+
+&spi_flash {
+	u-boot,dm-pre-reloc;
+};

arch/arm/dts/rk3399-gru.dtsi

@@ -537,7 +537,7 @@ ap_i2c_audio: &i2c8 {
 	pinctrl-names = "default", "sleep";
 	pinctrl-1 = <&spi1_sleep>;
 
-	spiflash@0 {
+	spi_flash: spiflash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
 

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

@@ -4,11 +4,14 @@
  */
 #define USB_CLASS_HUB			9
 
+#include "rockchip-u-boot.dtsi"
+
 / {
 	aliases {
 		mmc0 = &sdhci;
 		mmc1 = &sdmmc;
 		pci0 = &pcie0;
+		spi1 = &spi1;
 	};
 
 	cic: syscon@ff620000 {
@@ -57,6 +60,30 @@
 
 };
 
+#ifdef CONFIG_ROCKCHIP_SPI_IMAGE
+&binman {
+	rom {
+		filename = "u-boot.rom";
+		size = <0x400000>;
+		pad-byte = <0xff>;
+
+		mkimage {
+			args = "-n rk3399 -T rkspi";
+			u-boot-spl {
+			};
+		};
+		u-boot-img {
+			offset = <0x40000>;
+		};
+		u-boot {
+			offset = <0x300000>;
+		};
+		fdtmap {
+		};
+	};
+};
+#endif
+
 &cru {
 	u-boot,dm-pre-reloc;
 };

arch/arm/mach-rockchip/rk3399/Kconfig

@@ -5,6 +5,8 @@ choice
 
 config TARGET_CHROMEBOOK_BOB
 	bool "Asus Flip C101PA Chromebook (RK3399)"
+	select HAS_ROM
+	select ROCKCHIP_SPI_IMAGE
 	help
 	  Bob is a small RK3299-based device similar in apperance to Minnie.
 	  It has two USB 3.0 type-C ports, 4GB of SDRAM, WiFi and a 10.1",