mac80211: don't expose ieee80211_add_srates_ie()

This and ieee80211_add_ext_srates_ie() aren't
exported, so can't be used by drivers anyway,
but there's also no reason that they should be
so make them private to mac80211 and use sdata
instead of vif arguments.

Acked-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 341d77d..6b7157d 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1480,6 +1480,10 @@
 			       struct ieee80211_channel *channel,
 			       enum nl80211_channel_type channel_type,
 			       u16 prot_mode);
+int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
+			    struct sk_buff *skb, bool need_basic);
+int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
+				struct sk_buff *skb, bool need_basic);
 
 /* channel management */
 enum ieee80211_chan_mode {