iommu/mediatek: Move vld_pa_rng into plat_data

Both mt8173 and mt8183 don't have this vld_pa_rng(valid physical address
range) register while mt2712 have. Move it into the plat_data.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index 8d3b525..973d6e0 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -38,6 +38,7 @@ struct mtk_iommu_plat_data {
 
 	/* HW will use the EMI clock if there isn't the "bclk". */
 	bool                has_bclk;
+	bool                has_vld_pa_rng;
 	bool                reset_axi;
 	unsigned char       larbid_remap[MTK_LARB_NR_MAX];
 };