boards: twatch_s3: enable battery charger

Enable the battery charger module form the X-Powers AXP2101 IC.

Signed-off-by: Valerio Setti <vsetti@baylibre.com>

boards/lilygo/twatch_s3/twatch_s3_procpu.dts

@@ -139,6 +139,15 @@
 	axp2101@34 {
 		compatible = "x-powers,axp2101";
 		reg = <0x34>;
+
+		charger {
+			compatible = "x-powers,axp2101-charger";
+			constant-charge-current-max-microamp = <300000>;
+			constant-charge-voltage-max-microvolt = <4200000>;
+			charge-term-current-microamp = <100000>;
+			vbackup-enable;
+		};
+
 		regulators {
 			compatible = "x-powers,axp2101-regulator";