iommu/mediatek: Fix compatible typo for mediatek,mt6893-iommu-mm

Fix the "mediatek.mt6893-iommu-mm" compatible string typo, as the
dot was actually meant to be a comma: "mediatek,mt6893-iommu-mm".

Fixes: f6a1e89 ("iommu/mediatek: Add support for Dimensity 1200 MT6893 MM IOMMU")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20250521151548.185910-1-angelogioacchino.delregno@collabora.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: AngeloGioacchino Del Regno

drivers/iommu/mtk_iommu.c

@@ -1791,7 +1791,7 @@ static const struct of_device_id mtk_iommu_of_ids[] = {
 	{ .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data},
 	{ .compatible = "mediatek,mt6779-m4u", .data = &mt6779_data},
 	{ .compatible = "mediatek,mt6795-m4u", .data = &mt6795_data},
-	{ .compatible = "mediatek.mt6893-iommu-mm", .data = &mt6893_data},
+	{ .compatible = "mediatek,mt6893-iommu-mm", .data = &mt6893_data},
 	{ .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data},
 	{ .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
 	{ .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},