dt-bindings: interconnect: fsl,imx8m-noc: drop unneeded quotes

Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230609140732.64828-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>

Author: krzk

Documentation/devicetree/bindings/interconnect/fsl,imx8m-noc.yaml

@@ -51,7 +51,7 @@ properties:
     type: object
 
   fsl,ddrc:
-    $ref: "/schemas/types.yaml#/definitions/phandle"
+    $ref: /schemas/types.yaml#/definitions/phandle
     description:
       Phandle to DDR Controller.