dt-bindings: leds: qcom-lpg: Document PM8550 compatible

The PM8550 PWM modules are compatible with the PM8350c PWM modules,
document the PM8350c PWM compatible as fallback for the PM8550 PWM.
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230522-topic-sm8550-upstream-pm8550-lpg-v2-1-c5117f1d41f9@linaro.orgSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml

@@ -16,19 +16,24 @@ description: >
 
 properties:
   compatible:
-    enum:
-      - qcom,pm660l-lpg
-      - qcom,pm8150b-lpg
-      - qcom,pm8150l-lpg
-      - qcom,pm8350c-pwm
-      - qcom,pm8916-pwm
-      - qcom,pm8941-lpg
-      - qcom,pm8994-lpg
-      - qcom,pmc8180c-lpg
-      - qcom,pmi632-lpg
-      - qcom,pmi8994-lpg
-      - qcom,pmi8998-lpg
-      - qcom,pmk8550-pwm
+    oneOf:
+      - enum:
+          - qcom,pm660l-lpg
+          - qcom,pm8150b-lpg
+          - qcom,pm8150l-lpg
+          - qcom,pm8350c-pwm
+          - qcom,pm8916-pwm
+          - qcom,pm8941-lpg
+          - qcom,pm8994-lpg
+          - qcom,pmc8180c-lpg
+          - qcom,pmi632-lpg
+          - qcom,pmi8994-lpg
+          - qcom,pmi8998-lpg
+          - qcom,pmk8550-pwm
+      - items:
+          - enum:
+              - qcom,pm8550-pwm
+          - const: qcom,pm8350c-pwm
 
   "#pwm-cells":
     const: 2