ARM: dts: stm32: Add ADC support to stm32f429

Add ADC support & pinctrl analog phandle (adc3_in8) to stm32f429.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32f429.dtsi

@@ -188,6 +188,49 @@ usart6: serial@40011400 {
 			status = "disabled";
 		};
 
+		adc: adc@40012000 {
+			compatible = "st,stm32f4-adc-core";
+			reg = <0x40012000 0x400>;
+			interrupts = <18>;
+			clocks = <&rcc 0 168>;
+			clock-names = "adc";
+			interrupt-controller;
+			#interrupt-cells = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			adc1: adc@0 {
+				compatible = "st,stm32f4-adc";
+				#io-channel-cells = <1>;
+				reg = <0x0>;
+				clocks = <&rcc 0 168>;
+				interrupt-parent = <&adc>;
+				interrupts = <0>;
+				status = "disabled";
+			};
+
+			adc2: adc@100 {
+				compatible = "st,stm32f4-adc";
+				#io-channel-cells = <1>;
+				reg = <0x100>;
+				clocks = <&rcc 0 169>;
+				interrupt-parent = <&adc>;
+				interrupts = <1>;
+				status = "disabled";
+			};
+
+			adc3: adc@200 {
+				compatible = "st,stm32f4-adc";
+				#io-channel-cells = <1>;
+				reg = <0x200>;
+				clocks = <&rcc 0 170>;
+				interrupt-parent = <&adc>;
+				interrupts = <2>;
+				status = "disabled";
+			};
+		};
+
 		syscfg: system-config@40013800 {
 			compatible = "syscon";
 			reg = <0x40013800 0x400>;
@@ -368,6 +411,12 @@ pins {
 					slew-rate = <2>;
 				};
 			};
+
+			adc3_in8_pin: adc@200 {
+				pins {
+					pinmux = <STM32F429_PF10_FUNC_ANALOG>;
+				};
+			};
 		};
 
 		rcc: rcc@40023810 {