boards: ti: lp_mspm0g3507: enable rtc node

enable status for rtc in launchpad MSPM0G3507

Signed-off-by: Karthikeyan Krishnasamy <karthikeyan@linumiz.com>

Author: karthi012

boards/ti/lp_mspm0g3507/lp_mspm0g3507.dts

@@ -18,6 +18,7 @@
 
 	aliases {
 		led0 = &led0;
+		rtc = &rtc;
 	};
 
 	chosen {
@@ -105,3 +106,7 @@
 	pinctrl-0 = <&uart0_tx_pa10 &uart0_rx_pa11>;
 	pinctrl-names = "default";
 };
+
+&rtc {
+	status = "okay";
+};