Add support for hwpm context switching Bug 1648200 Change-Id: I482899bf165cd2ef24bb8617be16df01218e462f Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com> Reviewed-on: http://git-master/r/1120450 Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>