ARM: dts: stm32: Add alternate pinmux for UART5 pins

Add another mux option for UART5 pins, this is used on DRC Compact board.

Signed-off-by: Marek Vasut <[e-mail]>
Cc: Alexandre Torgue <[e-mail]>
Cc: [e-mail]
To: [e-mail]
Signed-off-by: Alexandre Torgue <[e-mail]>

arch/arm/boot/dts/stm32mp15-pinctrl.dtsi

···
 		};
 	};
 
+	uart5_pins_a: uart5-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('B', 13, AF14)>; /* UART5_TX */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('B', 5, AF12)>; /* UART5_RX */
+			bias-disable;
+		};
+	};
+
 	uart7_pins_a: uart7-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('E', 8, AF7)>; /* UART7_TX */