ARM: dts: qcom: sd600-eval: pm8921_s2 regulator properties

Add the missing properties for pm8921 smps2.
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: NAndy Gross <andy.gross@linaro.org>

arch/arm/boot/dts/qcom-apq8064-arrow-sd-600eval.dts

@@ -74,6 +74,14 @@
 					bias-pull-down;
 				};
 
+				s2 {
+					regulator-min-microvolt = <1300000>;
+					regulator-max-microvolt = <1300000>;
+					qcom,switch-mode-frequency = <1600000>;
+					bias-pull-down;
+					regulator-always-on;
+				};
+
 				s3 {
 					regulator-min-microvolt = <1000000>;
 					regulator-max-microvolt = <1400000>;