commit 93694f9630b0ed29cda61df58e480dcb34ef52fd upstream

Nothing consumes this attribute of a region and devres otherwise
remembers the value for de-allocation purposes.
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NYang Shi <yang.shi@linux.alibaba.com>
Reviewed-by: NGavin Shan <shan.gavin@linux.alibaba.com>