tests: kernel: tickless: Add system timer support for RZ/V2L, RZ/A3UL

Add tickless concept test support for RZ/V2L-SMARC, RZ/A3UL-SMARC

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

Author: Hoang Nguyen

tests/kernel/tickless/tickless_concept/boards/rza3ul_smarc.overlay

@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2025 Renesas Electronics Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&gtm0 {
+	os_timer {
+		status = "okay";
+	};
+};

tests/kernel/tickless/tickless_concept/boards/rzv2l_smarc_r9a07g054l23gbg_cm33.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2025 Renesas Electronics Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&gtm0 {
+	os_timer {
+		status = "okay";
+	};
+};
+
+&systick {
+	status = "disabled";
+};