mac80211: Update mesh config IE to 11s draft 3.02

The mesh config information element has changed significantly since draft 1.08
This patch brings it up to date.

Thanks to Sam Leffler and Rui Paulo for identifying this.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 21556a2..52e15e0 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -115,7 +115,7 @@
 #define IEEE80211_MAX_SSID_LEN		32
 
 #define IEEE80211_MAX_MESH_ID_LEN	32
-#define IEEE80211_MESH_CONFIG_LEN	19
+#define IEEE80211_MESH_CONFIG_LEN	24
 
 #define IEEE80211_QOS_CTL_LEN		2
 #define IEEE80211_QOS_CTL_TID_MASK	0x000F