drm/amdkfd: use tlb_seq from the VM subsystem for SVM as well v2

Instead of hand rolling the table_freed parameter.

v2: add some changes suggested by Philip

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Philip <Yang&lt;Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>