cfg80211: Add new BSS attribute ht_opmode

Add a new BSS attribute to allow hostapd to set the current HT opmode.
Otherwise drivers won't be able to set up protection for HT rates in
AP mode.

Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/linux/nl80211.h

@@ -849,6 +849,8 @@ enum nl80211_commands {
  *	flag isn't set, the frame will be rejected. This is also used as an
  *	nl80211 capability flag.
  *
+ * @NL80211_ATTR_BSS_HTOPMODE: HT operation mode (u16)
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1025,6 +1027,8 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_OFFCHANNEL_TX_OK,
 
+	NL80211_ATTR_BSS_HT_OPMODE,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,