stm32mp257f_ev1_stm32mp257fxx_m33.dts: add i2c node

This commit adds the i2c2 node to the device tree for the
STM32MP257F-EV1 board. This node corresponds to the i2c exposed by the
GPIO expansion connector [1].

[1]: https://wiki.st.com/stm32mpu/wiki/STM32MP257x-EV1_-_hardware_description

Signed-off-by: Tanguy Raufflet <tanguy.raufflet@savoirfairelinux.com>

Author: Tanguy Raufflet

boards/st/stm32mp257f_ev1/stm32mp257f_ev1_stm32mp257fxx_m33.dts

@@ -49,6 +49,10 @@
 	clock-frequency = <DT_FREQ_M(400)>;
 };
 
+&gpiob {
+	status = "okay";
+};
+
 &gpiog {
 	status = "okay";
 };
@@ -70,3 +74,9 @@
 	current-speed = <115200>;
 	status = "disabled";
 };
+
+&i2c2 {
+	pinctrl-0 = <&i2c2_scl_pb5 &i2c2_sda_pb4>;
+	pinctrl-names = "default";
+	status = "okay";
+};