iommu: Move fwspec->iommu_priv to struct dev_iommu

Move the pointer for iommu private data from struct iommu_fwspec to
struct dev_iommu.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Will Deacon <will@kernel.org> # arm-smmu
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20200326150841.10083-17-joro@8bytes.org

include/linux/iommu.h

@@ -369,6 +369,7 @@ struct iommu_fault_param {
  *
  * @fault_param: IOMMU detected device fault reporting data
  * @fwspec:	 IOMMU fwspec data
+ * @priv:	 IOMMU Driver private data
  *
  * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
  *	struct iommu_group	*iommu_group;
@@ -377,6 +378,7 @@ struct dev_iommu {
 	struct mutex lock;
 	struct iommu_fault_param	*fault_param;
 	struct iommu_fwspec		*fwspec;
+	void				*priv;
 };
 
 int  iommu_device_register(struct iommu_device *iommu);
@@ -589,7 +591,6 @@ struct iommu_group *fsl_mc_device_group(struct device *dev);
 struct iommu_fwspec {
 	const struct iommu_ops	*ops;
 	struct fwnode_handle	*iommu_fwnode;
-	void			*iommu_priv;
 	u32			flags;
 	u32			num_pasid_bits;
 	unsigned int		num_ids;
@@ -629,12 +630,12 @@ static inline void dev_iommu_fwspec_set(struct device *dev,
 
 static inline void *dev_iommu_priv_get(struct device *dev)
 {
-	return dev->iommu->fwspec->iommu_priv;
+	return dev->iommu->priv;
 }
 
 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
 {
-	dev->iommu->fwspec->iommu_priv = priv;
+	dev->iommu->priv = priv;
 }
 
 int iommu_probe_device(struct device *dev);