ARM: dts: qcom: sdx55: Add pshold support

Add support for pshold block to drive pshold towards the PMIC, which is
used to trigger a configurable event such as reboot or poweroff of the
SDX55 platform.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210118051005.55958-7-manivannan.sadhasivam@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm/boot/dts/qcom-sdx55.dtsi

@@ -285,6 +285,11 @@ pdc: interrupt-controller@b210000 {
 			interrupt-controller;
 		};
 
+		restart@c264000 {
+			compatible = "qcom,pshold";
+			reg = <0x0c264000 0x1000>;
+		};
+
 		spmi_bus: qcom,spmi@c440000 {
 			compatible = "qcom,spmi-pmic-arb";
 			reg = <0x0c440000 0x0000d00>,