{nl,cfg,mac}80211: Allow user to see/configure HT protection mode

This patch introduces a new mesh configuration parameter "ht_opmode" and will
allow user to check the current HT protection mode selected. Users could
configure the protection mode by the command "iw mesh_iface set mesh_param
mesh_ht_protection_mode=2". The default protection mode of mesh is set to
non-HT mixed mode.

Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>
Reviewed-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 2e0ae73..8cc8461 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -157,6 +157,7 @@
 
 	if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
+		sdata->u.mesh.mshcfg.ht_opmode = ht_opmode;
 		changed = BSS_CHANGED_HT;
 		mpl_dbg("mesh_plink %pM: protection mode changed to %d",
 			sdata->vif.addr, ht_opmode);