boards: witte_technology: linum: add initial support

To the Linum board from Witte Technology based on STM32H753xx.

Signed-off-by: Felipe Neves <[email protected]>

Author: uLipe

boards/witte/index.rst

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+.. _boards-witte:
+
+Witte
+#####
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*

boards/witte/linum/Kconfig.defconfig

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+# STM32H753ZI Linum board configuration
+
+# Copyright (c) 2024 Felipe Neves
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_LINUM
+
+if NETWORKING
+
+config NET_L2_ETHERNET
+	default y
+
+endif # NETWORKING
+
+endif # BOARD_LINUM

boards/witte/linum/Kconfig.linum

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+# Copyright (c) 2024 Felipe Neves
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_LINUM
+	select SOC_STM32H753XX

boards/witte/linum/board.cmake

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+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(jlink "--device=STM32H753BI" "--speed=4000")
+board_runner_args(stm32cubeprogrammer "--port=swd" "--reset-mode=hw")
+board_runner_args(openocd --target-handle=_CHIPNAME.cpu0)
+
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/stm32cubeprogrammer.board.cmake)

boards/witte/linum/board.yml

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+board:
+  name: linum
+  vendor: witte
+  socs:
+    - name: stm32h753xx