[third_party/bcmdhd] Add type for reassoc command.

Fullmac firmware for brcmfmac provides a firmware command to reassociate
(roam) to a BSS. This change exposes the type that this command expects
as its input.

Test: none, change just adds a type.

Change-Id: I0b6cbdb53687223b8837b61b7b1b8e0d815d242b
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/bcmdhd/+/1100993
Reviewed-by: John Tan <johntan@google.com>
2 files changed