ARM: dts: stm32: add pin map for UART8 controller on stm32h743

Add a pin map configuration for using the UART8 controller on the
stm32h743 MCU.

Signed-off-by: Dario Binacchi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Torgue <[email protected]>

Author: passgat

arch/arm/boot/dts/st/stm32h7-pinctrl.dtsi

@@ -211,6 +211,19 @@
 		};
 	};
 
+	uart8_pins_a: uart8-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('J', 8, AF8)>; /* UART8_TX */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('J', 9, AF8)>; /* UART8_RX */
+			bias-disable;
+		};
+	};
+
 	usart1_pins_a: usart1-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('B', 14, AF4)>; /* USART1_TX */