dt-bindings: mmc: sdhci-msm: Document the SDX65 compatible

The SDHCI controller on SDX65 is based on MSM SDHCI v5 IP. Hence, document
the compatible with "qcom,sdhci-msm-v5" as the fallback.

Signed-off-by: Rohit Agarwal <quic_rohiagar@quicinc.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1651480665-14978-2-git-send-email-quic_rohiagar@quicinc.com


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