regulator: dt-bindings: pca9450: Add nxp,pf9453 compatible string

Add the compatible string "nxp,pf9453" for the PF9453 regulator. The PF9453
is similar to the PCA9460 but supports only LDO1, LDO2, LDO_SVNS, and
BUCK[1-4].

Restrict LDO and BUCK numbers for nxp,pf9453 and keep the same restriction
for other compatible strings.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20250314-pf9453-v5-1-ab0cf1f871b0@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml

@@ -17,6 +17,9 @@ description: |
   Datasheet is available at
   https://www.nxp.com/docs/en/data-sheet/PCA9450DS.pdf
 
+  Support PF9453, Datasheet is available at
+  https://www.nxp.com/docs/en/data-sheet/PF9453_SDS.pdf
+
 # The valid names for PCA9450 regulator nodes are:
 # BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6,
 # LDO1, LDO2, LDO3, LDO4, LDO5
@@ -30,6 +33,7 @@ properties:
       - nxp,pca9450c
       - nxp,pca9451a
       - nxp,pca9452
+      - nxp,pf9453
 
   reg:
     maxItems: 1
@@ -65,7 +69,7 @@ properties:
         unevaluatedProperties: false
 
     patternProperties:
-      "^LDO[1-4]$":
+      "^LDO([1-4]|-SNVS)$":
         type: object
         $ref: regulator.yaml#
         description:
@@ -118,6 +122,24 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: nxp,pf9453
+    then:
+      properties:
+        regulators:
+          patternProperties:
+            "^LDO[3-4]$": false
+            "^BUCK[5-6]$": false
+    else:
+      properties:
+        regulators:
+          properties:
+            LDO-SNVS: false
+
 examples:
   - |
     #include <dt-bindings/interrupt-controller/irq.h>