riscv: sifive: unleashed: Switch to use binman to generate u-boot.itb

At present SiFive Unleashed board uses the Makefile to create the FIT,
using USE_SPL_FIT_GENERATOR, which is deprecated as per the Makefile
warning. Update to use binman instead.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/riscv/dts/binman.dtsi

@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <config.h>
+
+/ {
+	binman: binman {
+		multiple-images;
+	};
+};
+
+&binman {
+	itb {
+		filename = "u-boot.itb";
+
+		fit {
+			description = "Configuration to load OpenSBI before U-Boot";
+			#address-cells = <1>;
+			fit,fdt-list = "of-list";
+
+			images {
+				uboot {
+					description = "U-Boot";
+					type = "standalone";
+					os = "U-Boot";
+					arch = "riscv";
+					compression = "none";
+					load = <CONFIG_SYS_TEXT_BASE>;
+
+					uboot_blob: blob-ext {
+						filename = "u-boot-nodtb.bin";
+					};
+				};
+
+				opensbi {
+					description = "OpenSBI fw_dynamic Firmware";
+					type = "firmware";
+					os = "opensbi";
+					arch = "riscv";
+					compression = "none";
+					load = <CONFIG_SPL_OPENSBI_LOAD_ADDR>;
+					entry = <CONFIG_SPL_OPENSBI_LOAD_ADDR>;
+
+					opensbi_blob: opensbi {
+						filename = "fw_dynamic.bin";
+					};
+				};
+
+				@fdt-SEQ {
+					description = "NAME";
+					type = "flat_dt";
+					compression = "none";
+				};
+			};
+
+			configurations {
+				default = "conf-1";
+
+				@conf-SEQ {
+					description = "NAME";
+					firmware = "opensbi";
+					loadables = "uboot";
+					fdt = "fdt-SEQ";
+				};
+			};
+		};
+	};
+};

arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi

@@ -3,6 +3,7 @@
  * Copyright (C) 2019 Jagan Teki <jagan@amarulasolutions.com>
  */
 
+#include "binman.dtsi"
 #include "fu540-c000-u-boot.dtsi"
 #include "fu540-hifive-unleashed-a00-ddr.dtsi"
 

board/sifive/unleashed/Kconfig

@@ -27,6 +27,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y
 	select SIFIVE_FU540
 	select ENV_IS_IN_SPI_FLASH
+	select BINMAN
 	imply CMD_DHCP
 	imply CMD_EXT2
 	imply CMD_EXT4

configs/sifive_unleashed_defconfig

@@ -14,6 +14,7 @@ CONFIG_RISCV_SMODE=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_SPL_LOAD_FIT_ADDRESS=0x84000000
+# CONFIG_USE_SPL_FIT_GENERATOR is not set
 CONFIG_DISPLAY_CPUINFO=y
 CONFIG_DISPLAY_BOARDINFO=y
 CONFIG_MISC_INIT_R=y