ARM: dts: stm32: add support of exti on stm32h743 pinctrl

This patch adds support of external interrupt (exti) on
all gpio ports of stm32h743.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32h743-pinctrl.dtsi

@@ -49,6 +49,8 @@ pin-controller {
 			#size-cells = <1>;
 			compatible = "st,stm32h743-pinctrl";
 			ranges = <0 0x58020000 0x3000>;
+			interrupt-parent = <&exti>;
+			st,syscfg = <&syscfg 0x8>;
 			pins-are-numbered;
 
 			gpioa: gpio@58020000 {
@@ -57,6 +59,8 @@ gpioa: gpio@58020000 {
 				reg = <0x0 0x400>;
 				clocks = <&rcc GPIOA_CK>;
 				st,bank-name = "GPIOA";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpiob: gpio@58020400 {
@@ -65,6 +69,8 @@ gpiob: gpio@58020400 {
 				reg = <0x400 0x400>;
 				clocks = <&rcc GPIOB_CK>;
 				st,bank-name = "GPIOB";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpioc: gpio@58020800 {
@@ -73,6 +79,8 @@ gpioc: gpio@58020800 {
 				reg = <0x800 0x400>;
 				clocks = <&rcc GPIOC_CK>;
 				st,bank-name = "GPIOC";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpiod: gpio@58020c00 {
@@ -81,6 +89,8 @@ gpiod: gpio@58020c00 {
 				reg = <0xc00 0x400>;
 				clocks = <&rcc GPIOD_CK>;
 				st,bank-name = "GPIOD";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpioe: gpio@58021000 {
@@ -89,6 +99,8 @@ gpioe: gpio@58021000 {
 				reg = <0x1000 0x400>;
 				clocks = <&rcc GPIOE_CK>;
 				st,bank-name = "GPIOE";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpiof: gpio@58021400 {
@@ -97,6 +109,8 @@ gpiof: gpio@58021400 {
 				reg = <0x1400 0x400>;
 				clocks = <&rcc GPIOF_CK>;
 				st,bank-name = "GPIOF";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpiog: gpio@58021800 {
@@ -105,6 +119,8 @@ gpiog: gpio@58021800 {
 				reg = <0x1800 0x400>;
 				clocks = <&rcc GPIOG_CK>;
 				st,bank-name = "GPIOG";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpioh: gpio@58021c00 {
@@ -113,6 +129,8 @@ gpioh: gpio@58021c00 {
 				reg = <0x1c00 0x400>;
 				clocks = <&rcc GPIOH_CK>;
 				st,bank-name = "GPIOH";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpioi: gpio@58022000 {
@@ -121,6 +139,8 @@ gpioi: gpio@58022000 {
 				reg = <0x2000 0x400>;
 				clocks = <&rcc GPIOI_CK>;
 				st,bank-name = "GPIOI";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpioj: gpio@58022400 {
@@ -129,6 +149,8 @@ gpioj: gpio@58022400 {
 				reg = <0x2400 0x400>;
 				clocks = <&rcc GPIOJ_CK>;
 				st,bank-name = "GPIOJ";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			gpiok: gpio@58022800 {
@@ -137,6 +159,8 @@ gpiok: gpio@58022800 {
 				reg = <0x2800 0x400>;
 				clocks = <&rcc GPIOK_CK>;
 				st,bank-name = "GPIOK";
+				interrupt-controller;
+				#interrupt-cells = <2>;
 			};
 
 			usart1_pins: usart1@0 {