Revert "Revert "console: implement lockdep support for console_lock""

This reverts commit ff0d05bf73620eb7dc8aee7423e992ef87870bdf.

Now that we have all the locking fixes in place, we can revert the
revert. This re-enables lockdep tracking for the console lock,
daee779718a319ff9f83e1ba3339334ac650bb22.

Signed-off-by: Dave Airlie <airlied@redhat.com>