ARM: dts: msm8974: castor: Define pm8841 regulators

Define the pm8841 regulators under SMD/RPM, to allow the modem
remoteproc to set the voltage during boot of the remote processor.

Entries are just copied from the Honami dts.

Signed-off-by: Bjorn Andersson <[e-mail]>
Signed-off-by: Luca Weiss <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/qcom-msm8974pro-sony-xperia-shinano-castor.dts

···
 
 &rpm_requests {
 	regulators-0 {
+		compatible = "qcom,rpm-pm8841-regulators";
+
+		pm8841_s1: s1 {
+			regulator-min-microvolt = <675000>;
+			regulator-max-microvolt = <1050000>;
+		};
+
+		pm8841_s2: s2 {
+			regulator-min-microvolt = <500000>;
+			regulator-max-microvolt = <1050000>;
+		};
+
+		pm8841_s3: s3 {
+			regulator-min-microvolt = <500000>;
+			regulator-max-microvolt = <1050000>;
+		};
+
+		pm8841_s4: s4 {
+			regulator-min-microvolt = <500000>;
+			regulator-max-microvolt = <1050000>;
+		};
+	};
+
+	regulators-1 {
 		compatible = "qcom,rpm-pm8941-regulators";
 
 		vdd_l1_l3-supply = <&pm8941_s1>;