dt-bindings: mmc: mtk-sd: Add support for Dimensity 1200 MT6893

Add a compatible for the MediaTek Dimensity 1200 (MT6893) SoC.
All of the MMC/SD controllers in this chip are compatible with
the ones found in MT8183, but do also make use of an optional
crypto clock when enabling HW disk encryption.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250416120245.147951-1-angelogioacchino.delregno@collabora.com


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