doc: fix typo in feature-removal-schedule

Signed-off-by: NStefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Documentation/feature-removal-schedule.txt

@@ -307,7 +307,7 @@ Who:	John W. Linville <linville@tuxdriver.com>
 
 ---------------------------
 
-What:	iee80211 softmac wireless networking component
+What:	ieee80211 softmac wireless networking component
 When:	2.6.26 (or after removal of bcm43xx and port of zd1211rw to mac80211)
 Files:	net/ieee80211/softmac
 Why:	No in-kernel drivers will depend on it any longer.