hostap: convert usage of net/ieee80211.h to linux/ieee80211.h

So that net/ieee80211.h can be made private to ipw2x00 in a follow-up.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/hostap/hostap_80211.h b/drivers/net/wireless/hostap/hostap_80211.h
index 3a9474d..2e9fb0f 100644
--- a/drivers/net/wireless/hostap/hostap_80211.h
+++ b/drivers/net/wireless/hostap/hostap_80211.h
@@ -2,7 +2,7 @@
 #define HOSTAP_80211_H
 
 #include <linux/types.h>
-#include <net/ieee80211.h>
+#include <linux/skbuff.h>
 
 struct hostap_ieee80211_mgmt {
 	__le16 frame_control;