In commit "regulator: qcom: Rework to single platform device" the smb208 regulator
used in IPQ8064 was left out.

Add it to that new framework and update Docs accordingly.

Signed-off-by: Adrian Panella <ianchi74@outlook.com>

--- a/Documentation/devicetree/bindings/mfd/qcom-rpm.txt
+++ b/Documentation/devicetree/bindings/mfd/qcom-rpm.txt
@@ -59,6 +59,7 @@ Regulator nodes are identified by their
 		    "qcom,rpm-pm8058-regulators"
 		    "qcom,rpm-pm8901-regulators"
 		    "qcom,rpm-pm8921-regulators"
+		    "qcom,rpm-smb208-regulators"
 
 - vdd_l0_l1_lvs-supply:
 - vdd_l2_l11_l12-supply:
@@ -156,6 +157,9 @@ pm8921:
 	l29, lvs1, lvs2, lvs3, lvs4, lvs5, lvs6, lvs7, usb-switch, hdmi-switch,
 	ncp
 
+smb208:
+	s1a, s1b, s2a, s2b
+
 The content of each sub-node is defined by the standard binding for regulators -
 see regulator.txt - with additional custom properties described below:
 
--- a/drivers/regulator/qcom_rpm-regulator.c
+++ b/drivers/regulator/qcom_rpm-regulator.c
@@ -869,10 +869,19 @@ static const struct rpm_regulator_data r
 	{ }
 };
 
+static const struct rpm_regulator_data rpm_smb208_regulators[] = {
+	{ "s1a",  QCOM_RPM_SMB208_S1a, &smb208_smps, "vin_s1a" },
+	{ "s1b",  QCOM_RPM_SMB208_S1b, &smb208_smps, "vin_s1b" },
+	{ "s2a",  QCOM_RPM_SMB208_S2a, &smb208_smps, "vin_s2a" },
+	{ "s2b",  QCOM_RPM_SMB208_S2b, &smb208_smps, "vin_s2b" },
+	{ }
+};
+
 static const struct of_device_id rpm_of_match[] = {
 	{ .compatible = "qcom,rpm-pm8058-regulators", .data = &rpm_pm8058_regulators },
 	{ .compatible = "qcom,rpm-pm8901-regulators", .data = &rpm_pm8901_regulators },
 	{ .compatible = "qcom,rpm-pm8921-regulators", .data = &rpm_pm8921_regulators },
+	{ .compatible = "qcom,rpm-smb208-regulators", .data = &rpm_smb208_regulators },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, rpm_of_match);