dt-bindings: pinctrl: qcom,sm8450: drop checks used in common TLMM

The common Qualcomm TLMM pin controller schema already brings
requirement of function for GPIO pins.

Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221017230012.47878-16-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Documentation/devicetree/bindings/pinctrl/qcom,sm8450-pinctrl.yaml

@@ -60,6 +60,7 @@ $defs:
     description:
       Pinctrl node's client devices use subnodes for desired pin configuration.
       Client device subnodes use below standard properties.
+    $ref: qcom,tlmm-common.yaml#/$defs/qcom-tlmm-state
 
     properties:
       pins:
@@ -112,16 +113,6 @@ $defs:
     required:
       - pins
 
-    allOf:
-      - $ref: "qcom,tlmm-common.yaml#/$defs/qcom-tlmm-state"
-      - if:
-          properties:
-            pins:
-              pattern: "^gpio([0-9]|[1-9][0-9]|1[0-9][0-9]|20[0-9])$"
-        then:
-          required:
-            - function
-
     additionalProperties: false
 
 examples: