Add SPDX-License-Identifier and copyright headers to Infineon board overlay files in flash_shell, uart async_api, and nvs samples for cy8cproto_062_4343w and cy8cproto_063_ble boards. Signed-off-by: Sreeram Tatapudi <sreeram.praveen@infineon.com>
.. zephyr:code-sample-category:: uart :name: Universal Asynchronous Receiver-Transmitter (UART) :show-listing: These samples demonstrate how to use the :ref:`UART <uart_api>` driver API.