Add mt8186 iommu binding. "-mm" means the iommu is for Multimedia.
Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Reviewed-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>