The kernel-doc script identified a large number of documentation
issues in dp/wifi3.0/dp_rx.[ch], so fix those issues. In addition,
there are a number of instances where public functions have their
implementation documented instead of having their interface
documented, so move that documentation.
Change-Id: Id0ac49ebfa23790346384d688cc6346f513a7969
CRs-Fixed: 3373158