shields: add MikroE Flash 8 Click shield

boards/shields/mikroe_flash_8_click/Kconfig.shield

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+# Copyright The Zephyr Project Contributors
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_MIKROE_FLASH_8_CLICK
+	def_bool $(shields_list_contains,mikroe_flash_8_click)

boards/shields/mikroe_flash_8_click/doc/index.rst

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+.. _mikroe_flash_8_click_shield:
+
+MikroElektronika Flash 8 Click
+================================
+
+Overview
+********
+
+`Flash 8 Click`_ is a compact add-on board representing a highly reliable memory solution.
+
+This board features the GD5F2GQ5UEYIGR, a 2Gb high-density non-volatile memory storage solution
+for embedded systems from GigaDevice Semiconductor. It is based on an industry-standard NAND Flash
+memory core, representing an attractive alternative to SPI-NOR and standard parallel NAND Flash
+with advanced features. The GD5F2GQ5UEYIGR also has advanced security features (8K-Byte OTP region),
+software/hardware write protection, can withstand many write cycles (minimum 100k), and has a data
+retention period greater than ten years.
+
+.. figure:: images/mikroe_flash_8_click.webp
+   :align: center
+   :alt: Flash 8 Click
+   :height: 300px
+
+   Flash 8 Click
+
+Requirements
+************
+
+This shield can only be used with a board that provides a mikroBUS™ socket and defines a
+``mikrobus_spi`` node label for the mikroBUS™ SPI interface. See :ref:`shields` for more
+details.
+
+Programming
+***********
+
+Set ``--shield mikroe_flash_8_click`` when you invoke ``west build``. For example:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/drivers/flash_shell
+   :board: frdm_mcxn947/mcxn947/cpu0
+   :shield: mikroe_flash_8_click
+   :goals: build
+
+References
+**********
+
+- `Flash 8 Click`_
+
+.. _Flash 8 Click: https://www.mikroe.com/flash-8-click

boards/shields/mikroe_flash_8_click/mikroe_flash_8_click.overlay

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+/*
+ * Copyright The Zephyr Project Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&mikrobus_spi {
+	status = "okay";
+	cs-gpios = <&mikrobus_header 2 GPIO_ACTIVE_LOW>;
+
+	spi_nand_mikroe_flash_8_click: spi-nand@0 {
+		compatible = "jedec,spi-nand";
+		reg = <0>;
+		status = "okay";
+		spi-max-frequency = <104000000>;
+
+		/* gd5f2gq5ue parameters */
+		jedec-id = [c8 52];
+		size-bytes = <DT_SIZE_M(256)>;
+		erase-block-size = <DT_SIZE_K(128)>;
+		write-block-size = <DT_SIZE_K(2)>;
+		block-erase-duration-max = <5000>;
+		page-program-duration-max = <600>;
+		page-read-duration-max = <200>;
+		reset-duration-max = <500>;
+	};
+};

boards/shields/mikroe_flash_8_click/shield.yml

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+shield:
+  name: mikroe_flash_8_click
+  full_name: Flash 8 Click
+  vendor: mikroe
+  supported_features:
+    - mtd