uacce: Remove unnecessary IOMMU_DEV_FEAT_IOPF

None of the drivers implement anything for IOMMU_DEV_FEAT_IOPF anymore,
remove it to avoid dead code.

Signed-off-by: Lu Baolu <[e-mail]>
Reviewed-by: Jason Gunthorpe <[e-mail]>
Reviewed-by: Kevin Tian <[e-mail]>
Acked-by: Zhangfei Gao <[e-mail]>
Tested-by: Zhangfei Gao <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Joerg Roedel <[e-mail]>

drivers/misc/uacce/uacce.c

···
 	kfree(uacce);
 }
 
-static unsigned int uacce_enable_sva(struct device *parent, unsigned int flags)
-{
-	int ret;
-
-	if (!(flags & UACCE_DEV_SVA))
-		return flags;
-
-	flags &= ~UACCE_DEV_SVA;
-
-	ret = iommu_dev_enable_feature(parent, IOMMU_DEV_FEAT_IOPF);
-	if (ret) {
-		dev_err(parent, "failed to enable IOPF feature! ret = %pe\n", ERR_PTR(ret));
-		return flags;
-	}
-	return flags | UACCE_DEV_SVA;
-}
-
-static void uacce_disable_sva(struct uacce_device *uacce)
-{
-	if (!(uacce->flags & UACCE_DEV_SVA))
-		return;
-
-	iommu_dev_disable_feature(uacce->parent, IOMMU_DEV_FEAT_IOPF);
-}
-
 /**
  * uacce_alloc() - alloc an accelerator
  * @parent: pointer of uacce parent device
···
 	uacce = kzalloc(sizeof(struct uacce_device), GFP_KERNEL);
 	if (!uacce)
 		return ERR_PTR(-ENOMEM);
-
-	flags = uacce_enable_sva(parent, flags);
 
 	uacce->parent = parent;
 	uacce->flags = flags;
···
 	return uacce;
 
 err_with_uacce:
-	uacce_disable_sva(uacce);
 	kfree(uacce);
 	return ERR_PTR(ret);
 }
···
 		 */
 		unmap_mapping_range(q->mapping, 0, 0, 1);
 	}
-
-	/* disable sva now since no opened queues */
-	uacce_disable_sva(uacce);
 
 	if (uacce->cdev)
 		cdev_device_del(uacce->cdev, &uacce->dev);