add sta bridge support

package/kernel/mac80211/patches/969-allow-sta-bridge.patch

@@ -0,0 +1,45 @@
+--- a/net/wireless/util.c	2018-01-22 23:10:57.014111703 -0500
++++ b/net/wireless/util.c	2018-01-22 23:14:53.458313048 -0500
+@@ -1018,7 +1018,6 @@
+ 	/* if it's part of a bridge, reject changing type to station/ibss */
+ 	if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
+ 	    (ntype == NL80211_IFTYPE_ADHOC ||
+-	     ntype == NL80211_IFTYPE_STATION ||
+ 	     ntype == NL80211_IFTYPE_P2P_CLIENT))
+ 		return -EBUSY;
+ 
+@@ -1063,11 +1062,6 @@
+ 	if (!err) {
+ 		dev->priv_flags &= ~IFF_DONT_BRIDGE;
+ 		switch (ntype) {
+-		case NL80211_IFTYPE_STATION:
+-			if (dev->ieee80211_ptr->use_4addr)
+-				break;
+-			/* fall through */
+-		case NL80211_IFTYPE_OCB:
+ 		case NL80211_IFTYPE_P2P_CLIENT:
+ 		case NL80211_IFTYPE_ADHOC:
+ 			dev->priv_flags |= IFF_DONT_BRIDGE;
+--- a/net/wireless/core.c	2018-01-22 23:10:57.002111693 -0500
++++ b/net/wireless/core.c	2018-01-22 23:16:14.930379807 -0500
+@@ -1112,8 +1112,7 @@
+ 		/* allow mac80211 to determine the timeout */
+ 		wdev->ps_timeout = -1;
+ 
+-		if ((wdev->iftype == NL80211_IFTYPE_STATION ||
+-		     wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
++		if ((wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
+ 		     wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
+ 			dev->priv_flags |= IFF_DONT_BRIDGE;
+ 
+--- a/net/wireless/nl80211.c	2018-01-22 23:10:57.010111699 -0500
++++ b/net/wireless/nl80211.c	2018-01-22 23:17:24.366435886 -0500
+@@ -2695,8 +2695,6 @@
+ 			       enum nl80211_iftype iftype)
+ {
+ 	if (!use_4addr) {
+-		if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
+-			return -EBUSY;
+ 		return 0;
+ 	}
+ 

package/network/services/hostapd/files/hostapd.sh

@@ -646,9 +646,6 @@ wpa_supplicant_prepare_interface() {
 			adhoc)
 				fail=1
 			;;
-			sta)
-				[ "$wds" = 1 ] || fail=1
-			;;
 		esac
 
 		[ -n "$fail" ] && {