dt-bindings: mmc: marvell,xenon-sdhci: Allow "dma-coherent" and "iommus"

The Marvell xenon-sdhci block can be cache-coherent and needs the
"dma-coherent" property. It can also be behind an IOMMU and needs the
"iommus" property.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250320-dt-marvell-mmc-v1-1-e51002ea0238@kernel.org


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