iommu/core: remove the temporary pgsize settings

Now that all IOMMU drivers are exporting their supported pgsizes,
we can remove the default pgsize settings in register_iommu().
Signed-off-by: NOhad Ben-Cohen <ohad@wizery.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

drivers/iommu/iommu.c

@@ -49,16 +49,6 @@ int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops)
 	if (bus->iommu_ops != NULL)
 		return -EBUSY;
 
-	/*
-	 * Set the default pgsize values, which retain the existing
-	 * IOMMU API behavior: drivers will be called to map
-	 * regions that are sized/aligned to order of 4KiB pages.
-	 *
-	 * This will be removed once all drivers are migrated.
-	 */
-	if (!ops->pgsize_bitmap)
-		ops->pgsize_bitmap = ~0xFFFUL;
-
 	bus->iommu_ops = ops;
 
 	/* Do IOMMU specific setup for this bus-type */