ARM: dts: stm32: add system config bank node for stm32h743

This patch adds system config support for stm32h743.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32h743.dtsi

@@ -235,6 +235,11 @@ exti: interrupt-controller@58000000 {
 			interrupts = <1>, <2>, <3>, <6>, <7>, <8>, <9>, <10>, <23>, <40>, <41>, <62>, <76>;
 		};
 
+		syscfg: system-config@58000400 {
+			compatible = "syscon";
+			reg = <0x58000400 0x400>;
+		};
+
 		lptimer2: timer@58002400 {
 			#address-cells = <1>;
 			#size-cells = <0>;