iommu: remove unused priv field from struct iommu_ops

The priv field from iommu_ops is a hangover from the of_dma_configure
series and isn't actually used. Remove it before it has chance to
spread.

Signed-off-by: Will Deacon <[e-mail]>
Acked-by: Laurent Pinchart <[e-mail]>
Acked-by: Will Deacon <[e-mail]>
Signed-off-by: Joerg Roedel <[e-mail]>

include/linux/iommu.h

···
  * @domain_get_windows: Return the number of windows for a domain
  * @of_xlate: add OF master IDs to iommu grouping
  * @pgsize_bitmap: bitmap of supported page sizes
- * @priv: per-instance data private to the iommu driver
  */
 struct iommu_ops {
 	bool (*capable)(enum iommu_cap);
···
 	int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
 
 	unsigned long pgsize_bitmap;
-	void *priv;
 };
 
 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE		1 /* Device added */