boards: lilygo: twatch_s3: add support for axp2101 power button

This commit enables the support for the power button provided by axp2101.
The button generates press/release events for the INPUT_KEY_POWER key.

Signed-off-by: Valerio Setti <[email protected]>

Author: valeriosetti

boards/lilygo/twatch_s3/twatch_s3_procpu.dts

@@ -140,6 +140,7 @@
 	axp2101@34 {
 		compatible = "x-powers,axp2101";
 		reg = <0x34>;
+		int-gpios = <&gpio0 21 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
 
 		charger {
 			compatible = "x-powers,axp2101-charger";