samples: tests: Add ehl_crb board overlay

Add board overlay to watchdog sample and test.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>

Author: finikorg

samples/drivers/watchdog/boards/ehl_crb.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2023 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&tco_wdt {
+	status = "okay";
+};

tests/drivers/watchdog/wdt_basic_api/boards/ehl_crb.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2023 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&tco_wdt {
+	status = "okay";
+};