media: tegra_v4l2: pass platform_data via soc_camera_link

media: tegra_v4l2: pass platform_data via soc_camera_link

soc_camera_link supports passing power on/off control callback to
soc_camera stack. So the power control can be handled by soc_camera
stack instead of our Tegra V4L2 host driver.

Also pass other platform_data fields via soc_camera_link instead of
a hacking nvhost_device_data struct.

Bug 1240806

Change-Id: I625c17680603ecd930f934bc37362a66705d90e5
Signed-off-by: Bryan Wu <pengw@nvidia.com>
Reviewed-on: http://git-master/r/246267
Reviewed-by: Allen Martin <amartin@nvidia.com>