arm64: dts: qcom: sc8180x: Enable the power key

No input events are generated from the pressing of the power key on
either Primus or Flex 5G, because the device node isn't enabled.

Give the power key node a label and enable this for the two devices.

Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Tested-by: Steev Klimaszewski <steev@kali.org>
Link: https://lore.kernel.org/r/20240812-sc8180x-pwrkey-enable-v1-1-2bcc22133774@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/sc8180x-lenovo-flex-5g.dts

@@ -484,6 +484,10 @@ &pcie3_phy {
 	status = "okay";
 };
 
+&pmc8180_pwrkey {
+	status = "okay";
+};
+
 &pmc8180c_lpg {
 	status = "okay";
 };

arch/arm64/boot/dts/qcom/sc8180x-pmics.dtsi

@@ -75,7 +75,7 @@ pmc8180_0: pmic@0 {
 		pon: pon@800 {
 			compatible = "qcom,pm8916-pon";
 			reg = <0x0800>;
-			pwrkey {
+			pmc8180_pwrkey: pwrkey {
 				compatible = "qcom,pm8941-pwrkey";
 				interrupts = <0x0 0x8 0x0 IRQ_TYPE_EDGE_BOTH>;
 				debounce = <15625>;

arch/arm64/boot/dts/qcom/sc8180x-primus.dts

@@ -578,6 +578,10 @@ &pcie1_phy {
 	status = "okay";
 };
 
+&pmc8180_pwrkey {
+	status = "okay";
+};
+
 &pmc8180c_lpg {
 	status = "okay";
 };