samples: drivers: dac: Add overlay for TI MSPM0 G-Series DAC module

Add devicetree overlay to enable the Zephyr DAC sample on boards using
the TI MSPM0 G-Series DAC module.

Signed-off-by: Santhosh Charles <[email protected]>

Author: santhosh-c-c

samples/drivers/dac/boards/lp_mspm0g3507.overlay

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2025 Linumiz GmbH
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	zephyr,user {
+		dac = <&dac0>;
+		dac-channel-id = <0>;
+		dac-resolution = <12>;
+	};
+};
+
+&dac0 {
+	status = "okay";
+};