dt-bindings: mmc: sdhci-msm: Document SM8350 SDHCI

Document the SDHCI on SM8350.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20221116123612.34302-1-konrad.dybcio@linaro.org


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