ARM: dts: stm32: Add alternate pinmux for I2C2 pins

Add another mux option for I2C2 pins, this is used on AV96 board.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/arch/arm/dts/stm32mp15-pinctrl.dtsi b/arch/arm/dts/stm32mp15-pinctrl.dtsi
index 8d00391..c385896 100644
--- a/arch/arm/dts/stm32mp15-pinctrl.dtsi
+++ b/arch/arm/dts/stm32mp15-pinctrl.dtsi
@@ -357,6 +357,23 @@
 		};
 	};
 
+	i2c2_pins_c: i2c2-4 {
+		pins {
+			pinmux = <STM32_PINMUX('F', 1, AF4)>, /* I2C2_SCL */
+				 <STM32_PINMUX('H', 5, AF4)>; /* I2C2_SDA */
+			bias-disable;
+			drive-open-drain;
+			slew-rate = <0>;
+		};
+	};
+
+	i2c2_pins_sleep_c: i2c2-5 {
+		pins {
+			pinmux = <STM32_PINMUX('F', 1, ANALOG)>, /* I2C2_SCL */
+				 <STM32_PINMUX('H', 5, ANALOG)>; /* I2C2_SDA */
+		};
+	};
+
 	i2c5_pins_a: i2c5-0 {
 		pins {
 			pinmux = <STM32_PINMUX('A', 11, AF4)>, /* I2C5_SCL */