mac80211: Send the management frame at requested rate

Whenever the scan request or tx_mgmt is requesting not to
use CCK rate for managemet frames through
NL80211_ATTR_TX_NO_CCK_RATE attribute, then mac80211 should
select appropriate least non-CCK rate. This could help to
send P2P probes and P2P action frames at non 11b rates
without diabling 11b rates globally.

Cc: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9cba010..56c3504 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1897,6 +1897,9 @@
 		flags |= IEEE80211_TX_CTL_TX_OFFCHAN;
 	}
 
+	if (no_cck)
+		flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
+
 	if (is_offchan && !offchan)
 		return -EBUSY;