samples: sensor: thermometer: frdm_rw612: enable Standby power mode

Enables System PM and Standby (AKA Sleep or PM3) mode, to test I2C
after waking from Standby mode.

Signed-off-by: Derek Snell <[email protected]>

Author: DerekSnell

samples/sensor/thermometer/boards/frdm_rw612.conf

@@ -0,0 +1,7 @@
+#
+# Copyright 2025 NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+CONFIG_PM=y
+CONFIG_PM_DEVICE=y

samples/sensor/thermometer/boards/frdm_rw612.overlay

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* Enable standby low power mode (AKA PM3, or Sleep mode) */
+&standby {
+	status = "okay";
+};