ARM: dts: nuvoton: add reset syscon property

Add nuvoton,sysgcr syscon property to the reset node to handle the general
control registers.
Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/nuvoton-common-npcm7xx.dtsi

@@ -110,6 +110,7 @@ rstc: rstc@f0801000 {
 			compatible = "nuvoton,npcm750-reset";
 			reg = <0xf0801000 0x70>;
 			#reset-cells = <2>;
+			nuvoton,sysgcr = <&gcr>;
 		};
 
 		clk: clock-controller@f0801000 {