dt-bindings: mmc: marvell,xenon-sdhci: Add reference to sdhci-common.yaml

The Marvell xenon-sdhci block is an SDHCI and can use properties from
sdhci-common.yaml, so change the reference.

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-v1-2-e51002ea0238@kernel.org


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