HSD#15017037436 arm64: dts: agilex5: add DTS support to enable ATF NAND boot

Add new DTS file to update the boot args and flash partition
details to accommodate the new FIP partition for ATF direct
NAND boot method.

Signed-off-by: Girisha Dengi <[email protected]>

Author: Girisha Dengi

arch/arm64/boot/dts/intel/Makefile

@@ -12,6 +12,7 @@ dtb-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga_agilex_n6000.dtb \
 				socfpga_agilex5_socdk_emmc.dtb \
 				socfpga_agilex5_socdk_nand.dtb \
 				socfpga_agilex5_socdk_nand_b0.dtb \
+				socfpga_agilex5_socdk_nand_b0_atfboot.dtb \
 				socfpga_agilex5_socdk_swvp_b0.dtb \
 				socfpga_agilex5_socdk_tsn_cfg2.dtb \
 				socfpga_agilex5_socdk_tsn_cfg2_b0.dtb \

arch/arm64/boot/dts/intel/socfpga_agilex5_socdk_nand_b0_atfboot.dts

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier:     GPL-2.0
+/*
+ * Copyright (c) 2025, Altera Corporation. All rights reserved.
+ */
+
+#include "socfpga_agilex5_socdk_nand_b0.dts"
+
+/ {
+	model = "SoCFPGA Agilex5 SoCDK";
+	compatible = "intel,socfpga-agilex5-socdk", "intel,socfpga-agilex5";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs = "console=uart8250,mmio32,0x10c02000,115200n8 \
+			earlycon=uart8250,mmio32,0x10c02000,115200n8 \
+			panic=-1 \
+			root=ubi0:rootfs rw rootwait rootfstype=ubifs ubi.mtd=2";
+	};
+};
+
+&nand {
+	status = "okay";
+	/delete-node/ flash@0;
+
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0>;
+		nand-bus-width = <8>;
+
+		partition@0 {
+			label = "u-boot";
+			reg = <0 0x200000>;
+		};
+
+		partition@200000 {
+			label = "fip";
+			reg = <0x200000 0x03200000>;
+		};
+
+		partition@3400000 {
+			label = "root";
+			reg = <0x03400000 0xfcc00000>;
+		};
+	};
+};