[PATCH] hostap: Replace WLAN_FC_ defines with ieee80211 ones

Replace remaining WLAN_FC_* defines with the ones used in ieee80211
header file. This completes the move from hostap version of frame
control field processing to ieee80211 version.

Signed-off-by: Jouni Malinen <jkmaline@cc.hut.fi>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>