mac80211: remove weak WEP IV accounting

Since WEP is practically dead, there seems very little
point in keeping WEP weak IV accounting.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --cc net/mac80211/cfg.c
Simple merge

diff --cc net/mac80211/debugfs_sta.c
Simple merge

diff --cc net/mac80211/sta_info.h
Simple merge

diff --cc net/mac80211/wep.c
Simple merge