UPSTREAM: wifi: mac80211: don't parse mbssid in assoc response

This is simply not valid and simplifies the next commit.
I'll make a separate patch for this in the current main
tree as well.

Bug: 254180332
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[Lee: Commit not upstream - plucked straight from Stable)
(cherry picked from commit 9478c5f9)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I83b35213bb47506e4c687e2c8be0c53dc497fd98