dt-bindings: mmc: fsl-imx-esdhc: update binding for i.MX50 and i.MX7D

i.MX50 eSDHC is compatible with i.MX53. i.MX7D uSDHC is compatible with
i.MX6SL. So update for them.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221223030347.17093-1-peng.fan@oss.nxp.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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

@@ -37,6 +37,12 @@ properties:
           - fsl,imx8mm-usdhc
           - fsl,imxrt1050-usdhc
           - nxp,s32g2-usdhc
+      - items:
+          - const: fsl,imx50-esdhc
+          - const: fsl,imx53-esdhc
+      - items:
+          - const: fsl,imx7d-usdhc
+          - const: fsl,imx6sl-usdhc
       - items:
           - enum:
               - fsl,imx8mq-usdhc