ARM: dts: qcom: apq8064: 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-v7-17-0472ec237f49@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm/boot/dts/qcom/qcom-apq8064.dtsi

@@ -368,25 +368,41 @@ acc3: clock-controller@20b8000 {
 		saw0: power-manager@2089000 {
 			compatible = "qcom,apq8064-saw2-v1.1-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,apq8064-saw2-v1.1-cpu", "qcom,saw2";
 			reg = <0x02099000 0x1000>, <0x02009000 0x1000>;
-			regulator;
+
+			saw1_vreg: regulator {
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1300000>;
+			};
 		};
 
 		saw2: power-manager@20a9000 {
 			compatible = "qcom,apq8064-saw2-v1.1-cpu", "qcom,saw2";
 			reg = <0x020a9000 0x1000>, <0x02009000 0x1000>;
-			regulator;
+
+			saw2_vreg: regulator {
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1300000>;
+			};
 		};
 
 		saw3: power-manager@20b9000 {
 			compatible = "qcom,apq8064-saw2-v1.1-cpu", "qcom,saw2";
 			reg = <0x020b9000 0x1000>, <0x02009000 0x1000>;
-			regulator;
+
+			saw3_vreg: regulator {
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1300000>;
+			};
 		};
 
 		sps_sic_non_secure: sps-sic-non-secure@12100000 {