iommu/vt-d: Remove SVM_FLAG_PRIVATE_PASID

mainline inclusion
from mainline-v5.13
commit 06905ea8
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO


CVE: NA

Intel-SIG: commit 06905ea8 iommu/vt-d: Remove SVM_FLAG_PRIVATE_PASID.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The SVM_FLAG_PRIVATE_PASID has never been referenced in the tree, and
there's no plan to have anything to use it. So cleanup it.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210323010600.678627-4-baolu.lu@linux.intel.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>