riscv: dts: spacemit: add Banana Pi BPI-F3 board device tree

Banana Pi BPI-F3 [1] is a industrial grade RISC-V development board, it
design with SpacemiT K1 8 core RISC-V chip [2].

Currently only support booting into console with only uart enabled,
other features will be added soon later.

Link: https://docs.banana-pi.org/en/BPI-F3/BananaPi_BPI-F3 [1]
Link: https://www.spacemit.com/en/spacemit-key-stone-2/ [2]
Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Acked-by: Jesse Taube <jesse@rivosinc.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Yixun Lan <dlan@gentoo.org>

arch/riscv/boot/dts/Makefile

@@ -5,6 +5,7 @@ subdir-y += microchip
 subdir-y += renesas
 subdir-y += sifive
 subdir-y += sophgo
+subdir-y += spacemit
 subdir-y += starfive
 subdir-y += thead
 

arch/riscv/boot/dts/spacemit/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_SPACEMIT) += k1-bananapi-f3.dtb

arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
+ */
+
+#include "k1.dtsi"
+
+/ {
+	model = "Banana Pi BPI-F3";
+	compatible = "bananapi,bpi-f3", "spacemit,k1";
+
+	chosen {
+		stdout-path = "serial0";
+	};
+};
+
+&uart0 {
+	status = "okay";
+};