This patch adds initial support for GM20B for GPU characteristics IOCTL. Bug 1392902 Change-Id: I55bfb7e087244eae1462d44319bd91c7c0901c2e Signed-off-by: Sami Kiminki <skiminki@nvidia.com> Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: http://git-master/r/359227 Reviewed-by: Automatic_Commit_Validation_User