regulator: dt-bindings: qcom,rpmh: Add PM7550 compatible

Add the PM7550 compatible for the regulators in the PMIC found with the
Milos SoC.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://patch.msgid.link/20250711-pm7550-pmr735b-rpmh-regs-v2-1-bca8cc15c199@fairphone.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml

@@ -40,6 +40,7 @@ description: |
       For PM660, smps1 - smps6, ldo1 - ldo3, ldo5 - ldo19
       For PM660L, smps1 - smps3, smps5, ldo1 - ldo8, bob
       For PM7325, smps1 - smps8, ldo1 - ldo19
+      For PM7550, smps1 - smps6, ldo1 - ldo23, bob
       For PM8005, smps1 - smps4
       For PM8009, smps1 - smps2, ldo1 - ldo7
       For PM8010, ldo1 - ldo7
@@ -66,6 +67,7 @@ properties:
       - qcom,pm660-rpmh-regulators
       - qcom,pm660l-rpmh-regulators
       - qcom,pm7325-rpmh-regulators
+      - qcom,pm7550-rpmh-regulators
       - qcom,pm8005-rpmh-regulators
       - qcom,pm8009-rpmh-regulators
       - qcom,pm8009-1-rpmh-regulators
@@ -218,6 +220,25 @@ allOf:
         "^vdd-l[358]-supply$": true
         "^vdd-s[1-8]-supply$": true
 
+  - if:
+      properties:
+        compatible:
+          enum:
+            - qcom,pm7550-rpmh-regulators
+    then:
+      properties:
+        vdd-bob-supply:
+          description: BOB regulator parent supply phandle.
+        vdd-l2-l3-supply: true
+        vdd-l4-l5-supply: true
+        vdd-l9-l10-supply: true
+        vdd-l12-l14-supply: true
+        vdd-l13-l16-supply: true
+        vdd-l15-l17-l18-l19-l20-l21-l22-l23-supply: true
+      patternProperties:
+        "^vdd-l(1|[6-8]|11)-supply$": true
+        "^vdd-s[1-6]-supply$": true
+
   - if:
       properties:
         compatible: