{nl,cfg,mac}80211: let userspace make meshif mesh gate

Allow userspace to set NL80211_MESHCONF_GATE_ANNOUNCEMENTS attribute,
which will advertise this mesh node as being a mesh gate.
NL80211_HWMP_ROOTMODE must be set or this will do nothing.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 20353bb..3769303 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1864,6 +1864,10 @@
  * @NL80211_MESHCONF_HWMP_RANN_INTERVAL:  The interval of time (in TUs) between
  * root announcements are transmitted.
  *
+ * @NL80211_MESHCONF_GATE_ANNOUNCEMENTS: Advertise that this mesh station has
+ * access to a broader network beyond the MBSS.  This is done via Root
+ * Announcement frames.
+ *
  * @NL80211_MESHCONF_ATTR_MAX: highest possible mesh configuration attribute
  *
  * @__NL80211_MESHCONF_ATTR_AFTER_LAST: internal use
@@ -1886,6 +1890,7 @@
 	NL80211_MESHCONF_HWMP_ROOTMODE,
 	NL80211_MESHCONF_ELEMENT_TTL,
 	NL80211_MESHCONF_HWMP_RANN_INTERVAL,
+	NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
 
 	/* keep last */
 	__NL80211_MESHCONF_ATTR_AFTER_LAST,