Update copyright dates + xosc delay

Author: tyeth

ports/raspberrypi/boards/pimoroni_plasma2350/board.c

@@ -1,6 +1,6 @@
 // This file is part of the CircuitPython project: https://circuitpython.org
 //
-// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+// SPDX-FileCopyrightText: Copyright (c) 2024 Scott Shawcroft for Adafruit Industries
 //
 // SPDX-License-Identifier: MIT
 

ports/raspberrypi/boards/pimoroni_plasma2350/pico-sdk-configboard.h

@@ -1,7 +1,12 @@
 // This file is part of the CircuitPython project: https://circuitpython.org
 //
-// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+// SPDX-FileCopyrightText: Copyright (c) 2024 Scott Shawcroft for Adafruit Industries
 //
 // SPDX-License-Identifier: MIT
 
+#pragma once
+
 // Put board-specific pico-sdk definitions here. This file must exist.
+
+// Allow extra time for xosc to start.
+#define PICO_XOSC_STARTUP_DELAY_MULTIPLIER 64