Add API gr_gp10b_get_preemption_mode_flags() to return supported and default graphics/compute preemption modes on gp10b Bug 1646259 Change-Id: I291a82a911e021b605b6d1ccae9cef663cc7a01a Signed-off-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-on: http://git-master/r/1133596 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>