dt-bindings: net: fec: add mx93 description

Add mx93 compatible string for fec driver.
Signed-off-by: NClark Wang <xiaoning.wang@nxp.com>
Acked-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/fsl,fec.yaml

@@ -51,6 +51,7 @@ properties:
               - fsl,imx8mm-fec
               - fsl,imx8mn-fec
               - fsl,imx8mp-fec
+              - fsl,imx93-fec
           - const: fsl,imx8mq-fec
           - const: fsl,imx6sx-fec
       - items: