cfg80211: constify MAC addresses in cfg80211 ops

This propagates through all the drivers and mac80211.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 57e0b26..ed2b817 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1839,11 +1839,11 @@
 
 /* TDLS */
 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
-			u8 *peer, u8 action_code, u8 dialog_token,
+			const u8 *peer, u8 action_code, u8 dialog_token,
 			u16 status_code, u32 peer_capability,
 			const u8 *extra_ies, size_t extra_ies_len);
 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
-			u8 *peer, enum nl80211_tdls_operation oper);
+			const u8 *peer, enum nl80211_tdls_operation oper);
 
 
 #ifdef CONFIG_MAC80211_NOINLINE