Implement HAL callback set_preemption_mode Bug 200238497 JIRA VFND-2683 Change-Id: I8fca8e1ba112d8782ce18f0899eca38a1d12b512 Signed-off-by: Richard Zhao <rizhao@nvidia.com> Reviewed-on: http://git-master/r/1236976 GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>