iommu/mediatek: Set dma_mask for PGTABLE_PA_35_EN

iommu/mediatek: Set dma_mask for PGTABLE_PA_35_EN

When we enable PGTABLE_PA_35_EN, the PA for pgtable may be 35bits.
Thus add dma_mask for it.

Fixes: 301c3ca12576 ("iommu/mediatek: Allow page table PA up to 35bit")
Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230316101445.12443-1-yong.wu@mediatek.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>