UPSTREAM: iommu/mediatek: Add mt8192 support

Add mt8192 iommu support.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Link: https://lore.kernel.org/r/20210111111914.22211-33-yong.wu@mediatek.com
Signed-off-by: Will Deacon <will@kernel.org>
(cherry picked from commit 9e3489e06fb94a7908c3c8f098c191ff711a8182)

BUG=b:174513569

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Change-Id: I5a35da29cb9512d432cf476d2342d96359d45d4f
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index 6f2168e..f81fa88 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -45,6 +45,7 @@ enum mtk_iommu_plat {
 	M4U_MT8167,
 	M4U_MT8173,
 	M4U_MT8183,
+	M4U_MT8192,
 };
 
 struct mtk_iommu_iova_region;