dt-bindings: mmc: sdhci-msm: Document the IPQ9574 compatible

Document the compatible for SDHCI on IPQ9574.

Signed-off-by: devi priya <quic_devipriy@quicinc.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230124141541.8290-7-quic_devipriy@quicinc.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>