[third_party/bcmdhd] Add WME counters struct Test: None. Type definition only. Change-Id: Ied03da23f192727e2ebfd7d3eba842b056293880 Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/bcmdhd/+/621081 Reviewed-by: Karthik Krishnaswami <karthikrish@google.com> (cherry picked from commit 185d2c5194006f7f7e85f479d3031c600ae60b66)