First, defining a new structure to support gk20a
power domain. Then making necessary modifications
to add so as to add DT support for gpu power-domain.
bug 200070810
Change-Id: I29e1c24b181e14743d3969103abfd1882d171f07
Signed-off-by: Sumit Singh <sumsingh@nvidia.com>
Reviewed-on: http://git-master/r/668973
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>