media: tegra_camera: use dynamic syncpts

media: tegra_camera: use dynamic syncpts

- use API nvhost_get_syncpt_client_managed() to get syncpts dynamically
- add new function pointers .init_syncpts() to initialize the syncpts at
  probe() time only

Bug 1305024

Change-Id: Ib751b0a23d556444ba9d86fedc978439b4212b90
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/364854
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Shridhar Rasal <srasal@nvidia.com>
Reviewed-by: Bryan Wu <pengw@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>