ARM: dts: qcom: msm8960: declare SAW2 regulators

The SAW2 (SPM and AVS Wrapper) among other things is yet another way to
handle CPU-related PMIC regulators. Provide a way to control voltage of
these regulators.
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240102-saw2-spm-regulator-v7-18-0472ec237f49@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm/boot/dts/qcom/qcom-msm8960.dtsi

@@ -223,13 +223,21 @@ acc1: clock-controller@2098000 {
 		saw0: power-manager@2089000 {
 			compatible = "qcom,msm8960-saw2-cpu", "qcom,saw2";
 			reg = <0x02089000 0x1000>, <0x02009000 0x1000>;
-			regulator;
+
+			saw0_vreg: regulator {
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1300000>;
+			};
 		};
 
 		saw1: power-manager@2099000 {
 			compatible = "qcom,msm8960-saw2-cpu", "qcom,saw2";
 			reg = <0x02099000 0x1000>, <0x02009000 0x1000>;
-			regulator;
+
+			saw1_vreg: regulator {
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1300000>;
+			};
 		};
 
 		gsbi5: gsbi@16400000 {