arm64: dts: renesas: rzg2ul-smarc-som: Enable OSTM

Enable OSTM{1, 2} interfaces on RZ/G2UL SMARC EVK.
OSTM0 is reserved for TF-A.
Signed-off-by: NBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: NLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20220425170530.200921-13-biju.das.jz@bp.renesas.comSigned-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/rzg2ul-smarc-som.dtsi

@@ -115,6 +115,14 @@
 	clock-frequency = <24000000>;
 };
 
+&ostm1 {
+	status = "okay";
+};
+
+&ostm2 {
+	status = "okay";
+};
+
 &pinctrl {
 	eth0_pins: eth0 {
 		pinmux = <RZG2L_PORT_PINMUX(4, 5, 1)>, /* ET0_LINKSTA */