drivers: media: tegra: Hotplug fixes II

drivers: media: tegra: Hotplug fixes II

Block processing notifier if channel is
not streaming.
Add two CPU increments as two events are
being tracked.
Update accurate time stamp information from
HW.
Update minimum number of buffers required
with the new single thread design

Bug 200092604
Bug 1736471

Change-Id: I471c5cbc0fb3d2fb10a6f73d77783dd7617ebb5f
Signed-off-by: Bhanu Murthy V <bmurthyv@nvidia.com>
Reviewed-on: http://git-master/r/1153951
(cherry picked from commit cdcf3e2a20629523a0fede835ae1965d3c188f79)
Reviewed-on: http://git-master/r/1168032
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sudhir Vyas <svyas@nvidia.com>