If xnack is on, new range is created to recover retry vm fault or
created by SVM API calls, set all GPUs have access to the range.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>