video: tegra: host: Extend syncpoint API

video: tegra: host: Extend syncpoint API

This patch extends syncpoint API to support some commonly used functions.
In addition, this patch modifies the current API so that it does not
require giving the host1x client device but it allows giving also host1x
device pointer directly.

Change-Id: Ie3ea53b0faaaa8209639a41f7c375b025b3a277e
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/378343
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>