staging: ozwpan: set port changed flag at disconnect

staging: ozwpan: set port changed flag at disconnect

Set port changed flag at every hub disconnect control message.
USB hub status should know correct port status always.

Also contains ugly WAR to recover from network failure cases.
After 3 port reset retries reset the net interface.

Bug 1522708

Change-Id: I1aa5baa837f60668cfb4a23dd7fa820be27151e7
Signed-off-by: Vinayak Pane <vpane@nvidia.com>
Reviewed-on: http://git-master/r/431926
GVS: Gerrit_Virtual_Submit
Reviewed-by: Peter Zu <pzu@nvidia.com>
Reviewed-by: Kevin Bruckert <kbruckert@nvidia.com>
Tested-by: Kevin Bruckert <kbruckert@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>