arm64: dts: stratix10: add the 'altr,modrst-off' property

Update the Stratix10 reset manager with the 'altr,modrst-offset' property.
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>

arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi

@@ -224,6 +224,7 @@
 			#reset-cells = <1>;
 			compatible = "altr,rst-mgr";
 			reg = <0xffd11000 0x1000>;
+			altr,modrst-offset = <0x20>;
 		};
 
 		spi0: spi@ffda4000 {