I botched a few of the changes when rebasing the changes in
4b6ed0758dc6fad17081d7bd791cb0edbddbddb8 across the changes in
43bbae19483fbde0a91e61acad8a6e71e334c8b8.
- Move the counter allocations into alloc_ofld_rxq().
- Free the counters freeing an ofld rxq.
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