dt-bindings: mmc: fsl-imx-esdhc: Add i.MX94 support

Add compatible string "fsl,imx94-usdhc" for the i.MX94 chip, which is
backward compatible with i.MX8mm. Set it to fall back to
"fsl,imx8mm-usdhc".

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250306170937.242183-1-Frank.Li@nxp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: nxpfrankli

Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml

@@ -57,6 +57,7 @@ properties:
               - fsl,imx8mp-usdhc
               - fsl,imx8ulp-usdhc
               - fsl,imx93-usdhc
+              - fsl,imx94-usdhc
               - fsl,imx95-usdhc
           - const: fsl,imx8mm-usdhc
       - items: