ARM: dts: stm32: add ADC support on stm32h743

Add support for ADC (Analog to Digital Converter) to STM32H743.
It has 3 ADCs, distributed over two ADC blocks:
- ADC1 and ADC2 @0x40022000
- ADC3 @0x58026000 (instantiated separately)
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32h743.dtsi

@@ -106,6 +106,59 @@ usart1: serial@40011000 {
 			clocks = <&timer_clk>;
 
 		};
+
+		adc_12: adc@40022000 {
+			compatible = "st,stm32h7-adc-core";
+			reg = <0x40022000 0x400>;
+			interrupts = <18>;
+			clocks = <&timer_clk>;
+			clock-names = "bus";
+			interrupt-controller;
+			#interrupt-cells = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			adc1: adc@0 {
+				compatible = "st,stm32h7-adc";
+				#io-channel-cells = <1>;
+				reg = <0x0>;
+				interrupt-parent = <&adc_12>;
+				interrupts = <0>;
+				status = "disabled";
+			};
+
+			adc2: adc@100 {
+				compatible = "st,stm32h7-adc";
+				#io-channel-cells = <1>;
+				reg = <0x100>;
+				interrupt-parent = <&adc_12>;
+				interrupts = <1>;
+				status = "disabled";
+			};
+		};
+
+		adc_3: adc@58026000 {
+			compatible = "st,stm32h7-adc-core";
+			reg = <0x58026000 0x400>;
+			interrupts = <127>;
+			clocks = <&timer_clk>;
+			clock-names = "bus";
+			interrupt-controller;
+			#interrupt-cells = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			adc3: adc@0 {
+				compatible = "st,stm32h7-adc";
+				#io-channel-cells = <1>;
+				reg = <0x0>;
+				interrupt-parent = <&adc_3>;
+				interrupts = <0>;
+				status = "disabled";
+			};
+		};
 	};
 };