iommu/msm: Use dev_iommu_priv_get/set()

Remove the use of dev->archdata.iommu and use the private per-device
pointer provided by IOMMU core code instead.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20200625130836.1916-4-joro@8bytes.org

drivers/iommu/msm_iommu.c

@@ -593,14 +593,14 @@ static void insert_iommu_master(struct device *dev,
 				struct msm_iommu_dev **iommu,
 				struct of_phandle_args *spec)
 {
-	struct msm_iommu_ctx_dev *master = dev->archdata.iommu;
+	struct msm_iommu_ctx_dev *master = dev_iommu_priv_get(dev);
 	int sid;
 
 	if (list_empty(&(*iommu)->ctx_list)) {
 		master = kzalloc(sizeof(*master), GFP_ATOMIC);
 		master->of_node = dev->of_node;
 		list_add(&master->list, &(*iommu)->ctx_list);
-		dev->archdata.iommu = master;
+		dev_iommu_priv_set(dev, master);
 	}
 
 	for (sid = 0; sid < master->num_mids; sid++)