tests: kernel: tickless: Add support for RZ/G3S-SMARC

Add test support for System Timer driver of RZ/G3S-SMARC

Signed-off-by: Nhut Nguyen <[email protected]>
Signed-off-by: Hoang Nguyen <[email protected]>

Author: nhutnguyenkc

tests/kernel/tickless/tickless_concept/boards/rzg3s_smarc_r9a08g045s33gbg_cm33.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&gtm0 {
+	os_timer {
+		status = "okay";
+	};
+};
+
+&systick {
+	status = "disabled";
+};