dt-bindings: pinctrl: qcom,sm8250: minor style cleanups

Drop "binding" from description (and align it with other Qualcomm
pinctrl bindings), drop redundant minItems, use double quotes
consistently and drop redundant quotes.
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221017230012.47878-27-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Documentation/devicetree/bindings/pinctrl/qcom,sm8250-pinctrl.yaml

@@ -9,23 +9,21 @@ title: Qualcomm Technologies, Inc. SM8250 TLMM block
 maintainers:
   - Bjorn Andersson <bjorn.andersson@linaro.org>
 
-description: |
-  This binding describes the Top Level Mode Multiplexer block found in the
-  SM8250 platform.
+description:
+  Top Level Mode Multiplexer pin controller in the Qualcomm SM8250 SoC.
 
 properties:
   compatible:
     const: qcom,sm8250-pinctrl
 
   reg:
-    minItems: 3
     maxItems: 3
 
   reg-names:
     items:
-      - const: "west"
-      - const: "south"
-      - const: "north"
+      - const: west
+      - const: south
+      - const: north
 
   interrupts: true
   interrupt-controller: true