ramips: add i2c in dts for GL-MT300N-V2

According wiki https://docs.gl-inet.com/en/2/hardware/mt300n-v2/
GL-MT300N-V2 have I2C interface on GPIO4, GPIO5.
Adding I2C in device tree make possible using I2C on this device.

Signed-off-by: Ptilopsis Leucotis <[email protected]>

target/linux/ramips/dts/mt7628an_glinet_gl-mt300n-v2.dts

@@ -131,6 +131,10 @@
 	};
 };
 
+&i2c {
+	status = "okay";
+};
+
 &uart1 {
 	status = "okay";
 };