mac80211: remove linux/wireless.h inclusion

linux/wireless.h is for wireless extensions only, so
mac80211 shouldn't include it since it uses cfg80211.

Signed-off-by: Johannes Berg <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

include/net/mac80211.h

···
 #include <linux/kernel.h>
 #include <linux/if_ether.h>
 #include <linux/skbuff.h>
-#include <linux/wireless.h>
 #include <linux/device.h>
 #include <linux/ieee80211.h>
 #include <net/cfg80211.h>