dt-bindings: mmc: Add support for MT8192 SoC

MT8192 mmc host IP is compatible with MT8183, let's add support for this.

Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Link: https://lore.kernel.org/r/20201014030846.12428-3-wenbin.mei@mediatek.com


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