dt-bindings: net: cdns,macb: Add versal compatible string

Add versal compatible string.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/cdns,macb.yaml

@@ -20,6 +20,7 @@ properties:
 
       - items:
           - enum:
+              - cdns,versal-gem       # Xilinx Versal
               - cdns,zynq-gem         # Xilinx Zynq-7xxx SoC
               - cdns,zynqmp-gem       # Xilinx Zynq Ultrascale+ MPSoC
           - const: cdns,gem           # Generic