dt-bindings: dma: Drop unneeded quotes

Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230331182141.1900348-1-robh@kernel.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/dma/ti/k3-udma.yaml

@@ -43,7 +43,7 @@ description: |
   configuration of the legacy peripheral.
 
 allOf:
-  - $ref: "../dma-controller.yaml#"
+  - $ref: ../dma-controller.yaml#
   - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
 
 properties:

Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml

@@ -15,7 +15,7 @@ maintainers:
   - Michael Tretter <m.tretter@pengutronix.de>
 
 allOf:
-  - $ref: "../dma-controller.yaml#"
+  - $ref: ../dma-controller.yaml#
 
 properties:
   "#dma-cells":

Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml

@@ -16,7 +16,7 @@ maintainers:
   - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 
 allOf:
-  - $ref: "../dma-controller.yaml#"
+  - $ref: ../dma-controller.yaml#
 
 properties:
   "#dma-cells":