boards: starfive: add visionfive2 board

these list of patches add support the Starfive Visionfive2
SBC based on the JH7110 SoC. Board identifier is `visionfive2`.

Signed-off-by: Kanak Shilledar <kanakshilledar111@protonmail.com>
Signed-off-by: Pratik Farkase <pratik.farkase@wsisweden.com>

boards/starfive/index.rst

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+.. _boards-starfive:
+
+StarFive
+########
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*

boards/starfive/visionfive2/Kconfig.defconfig

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+# Copyright (c) 2021 Katsuhiro Suzuki
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_VISIONFIVE2_JH7110
+
+config SYS_CLOCK_TICKS_PER_SEC
+	default 1000
+
+config SYS_CLOCK_HW_CYCLES_PER_SEC
+	default 1000000
+
+endif # BOARD_VISIONFIVE2_JH7110

boards/starfive/visionfive2/Kconfig.visionfive2

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+# Copyright (c) 2024 Kanak Shilledar <kanakshilledar111@protonmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_VISIONFIVE2_JH7110
+	select SOC_JH7110

boards/starfive/visionfive2/board.cmake

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+# SPDX-License-Identifier: Apache-2.0

boards/starfive/visionfive2/board.yml

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+# Copyright (c) 2024 Kanak Shilledar <kanakshilledar111@protonmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+board:
+  name: visionfive2
+  vendor: starfive
+  socs:
+    - name: jh7110

boards/starfive/visionfive2/doc/index.rst

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+.. _visionfive2:
+
+Starfive VisionFive2 JH7110
+###########################
+
+Overview
+********
+
+Starfive VisionFive 2 is the world’s first high-performance RISC-V single board computer (SBC) with an integrated GPU. Compared with its last generation, VisionFive 2 has been fully upgraded with significant improvements in the processor work frequency, multimedia processing capabilities, scalability, etc. Its superior performance and reasonable price make VisionFive 2 the best affordable RISC-V development board ever.
+
+.. figure:: img/Visionfive2.webp
+   :align: center
+   :alt:
+
+Programming and debugging
+*************************
+
+Building
+========
+
+Applications for the ``visionfive2_jh7110`` board configuration can be built
+as usual (see :ref:`build_an_application`) using the corresponding board name:
+
+.. zephyr-app-commands::
+   :board: visionfive2
+   :goals: build
+
+To build zephyr.bin for this board use this command:
+
+.. code-block:: console
+
+   west build -p always -b visionfive2 samples/hello_world/
+
+spl_tool is a jh7110 signature tool used to generate spl header information and generate zephyr.bin.normal.out.
+`here <https://github.com/starfive-tech/Tools/tree/master/spl_tool/>`_
+
+.. code-block:: console
+
+   ./spl_tool -c -f build/zephyr/zephyr.bin
+
+This will create a new file build/zephyr/zephyr.bin.normal.out that can be flashed.
+
+Flashing
+========
+
+.. note::
+   The following steps use minicom for serial communication, feel free to use
+   any other serial terminal that supports xmodem based file transfers.
+
+git clone the vf2-loader tool from https://github.com/orangecms/vf2-loader.git and xmodem tool from https://github.com/orangecms/xmodem.rs.git side by side.
+
+#. VisionFive2 uses uart for flashing. Refer to `VisionFive2 Recovery Quick Start Guide here <https://doc-en.rvspace.org/VisionFive2/Quick_Start_Guide/VisionFive2_SDK_QSG/recovering_bootloader%20-%20vf2.html>`_
+   to connect your serial-to-usb converter. Now power on the board and using
+   minicom access board's serial and press the reset switch on the board until you see CCCCCC... prompt
+
+Copy the zephyr.bin.normal.out from build/zephyr/zephyr.bin.normal.out to previously git cloned vf2-loader/ directory and cd into it.
+Flash the zephyr.bin.normal.out using this command:
+
+.. code-block:: console
+
+   cargo run -- zephyr.bin.normal.out && minicom -D /dev/ttyUSB0
+
+.. code-block:: console
+
+   cargo run -- zephyr.bin.normal.out && minicom -D /dev/ttyUSB0
+   Finished dev [unoptimized + debuginfo] target(s) in 0.03s
+   Running `target/debug/vf2-loader zephyr.bin.normal.out`
+   Welcome to minicom 2.7.1
+   OPTIONS: I18n
+   Compiled on Dec 23 2019, 02:06:26.
+   Port /dev/ttyUSB0, 14:59:24
+   Press CTRL-A Z for help on special keys
+   6*** Booting Zephyr OS build v3.6.0-rc3 ***
+   Hello World! visionfive2_jh7110

boards/starfive/visionfive2/visionfive2.dts

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+/*
+ * Copyright (c) 2024 Kanak Shilledar <kanakshilledar111@protonmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include "starfive/jh7110-visionfive-v2.dtsi"
+
+/ {
+	model = "StarFive VisionFive V2";
+	compatible = "starfive,visionfive-v2";
+
+	chosen {
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+		zephyr,sram = &ram0;
+	};
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+};
+
+&uart1 {
+	status = "okay";
+	current-speed = <115200>;
+};

boards/starfive/visionfive2/visionfive2.yaml

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+identifier: visionfive2
+name: Visionfive JH7110 (NON-SMP)
+type: mcu
+arch: riscv64
+toolchain:
+  - zephyr
+  - cross-compile
+supported:
+  - uart

boards/starfive/visionfive2/visionfive2_defconfig

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+# SPDX-License-Identifier: Apache-2.0
+
+# Zephyr Kernel Configuration
+CONFIG_PRINTK=y
+CONFIG_XIP=n
+
+# Serial Drivers
+CONFIG_SERIAL=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y