dt-bindings: mailbox: qcom,apcs-kpss-global: correct expected clocks for fallbacks

Commit 1e9cb7e ("dt-bindings: mailbox: qcom,apcs-kpss-global: use
fallbacks") and commit 34d8775 ("dt-bindings: mailbox:
qcom,apcs-kpss-global: use fallbacks for few variants") added fallbacks
to few existing compatibles.  Neither devices with these existing
compatibles nor devices using fallbacks alone, have clocks, so the
"if:then:" block defining this constrain should be written as
"contains:".

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>

Author: krzk

Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.yaml

@@ -165,12 +165,13 @@ allOf:
   - if:
       properties:
         compatible:
-          enum:
-            - qcom,msm8953-apcs-kpss-global
-            - qcom,msm8994-apcs-kpss-global
-            - qcom,msm8996-apcs-hmss-global
-            - qcom,qcm2290-apcs-hmss-global
-            - qcom,sdm845-apss-shared
+          contains:
+            enum:
+              - qcom,msm8953-apcs-kpss-global
+              - qcom,msm8994-apcs-kpss-global
+              - qcom,msm8996-apcs-hmss-global
+              - qcom,qcm2290-apcs-hmss-global
+              - qcom,sdm845-apss-shared
     then:
       properties:
         clocks: false