ath9k: enable dfs for mesh mode

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/init.c

@@ -856,6 +856,9 @@ static const struct ieee80211_iface_limit if_limits[] = {
 
 static const struct ieee80211_iface_limit if_dfs_limits[] = {
 	{ .max = 1,	.types = BIT(NL80211_IFTYPE_AP) |
+#ifdef CONFIG_MAC80211_MESH
+				 BIT(NL80211_IFTYPE_MESH_POINT) |
+#endif
 				 BIT(NL80211_IFTYPE_ADHOC) },
 };