samples: net: openthread: coprocessor: Enable uart1 explicitly

This application uses the uart1 DT node, so it should enable it,
not assume that it will be enabled by default for a given board.

Signed-off-by: Andrzej Głąbek <[email protected]>

Author: anangl

samples/net/openthread/coprocessor/app.overlay renamed to samples/net/openthread/coprocessor/boards/nrf52833dk_nrf52833.overlay

@@ -10,3 +10,7 @@
 		zephyr,console = &uart1;
 	};
 };
+
+&uart1 {
+	status = "okay";
+};

samples/net/openthread/coprocessor/boards/nrf52840dk_nrf52840.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,ot-uart = &uart0;
+		zephyr,console = &uart1;
+	};
+};
+
+&uart1 {
+	status = "okay";
+};