boards: Adding zephyr_i2c to Adafruit ESP32s3 QTPY

This adds the generic plugable alias to the Adafruit ESP32s3 QT PY for
its STEMMA-QT connector.

Signed-off-by: Ian Wakely <raveious.irw@gmail.com>

boards/adafruit/qt_py_esp32s3/adafruit_qt_py_esp32s3_procpu.dts

@@ -71,7 +71,7 @@
 	pinctrl-names = "default";
 };
 
-&i2c1 {
+zephyr_i2c: &i2c1 {
 	status = "okay";
 	clock-frequency = <I2C_BITRATE_STANDARD>;
 	pinctrl-0 = <&i2c1_default>;