arm64: dts: renesas: rzg2ul-smarc-som: Drop enabling wdt2

WDT CH2 is specifically to check the operation of Cortex-M33 CPU so
don't enable WDT2 by default.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20220914134211.199631-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

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

@@ -263,8 +263,3 @@ &wdt0 {
 	status = "okay";
 	timeout-sec = <60>;
 };
-
-&wdt2 {
-	status = "okay";
-	timeout-sec = <60>;
-};