cfg80211: Add API to update CSA counters in mgmt frames

Add NL80211_ATTR_CSA_C_OFFSETS_TX which holds an array
of offsets to the CSA counters which should be updated
when sending a management frames with NL80211_CMD_FRAME.

This API should be used by the drivers that wish to keep the
CSA counter updated in probe responses, but do not implement
probe response offloading and so, do not use
ieee80211_proberesp_get function.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index e3a48b0..f46e1e1 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1986,6 +1986,8 @@
  * @len: buffer length
  * @no_cck: don't use cck rates for this frame
  * @dont_wait_for_ack: tells the low level not to wait for an ack
+ * @n_csa_offsets: length of csa_offsets array
+ * @csa_offsets: array of all the csa offsets in the frame
  */
 struct cfg80211_mgmt_tx_params {
 	struct ieee80211_channel *chan;
@@ -1995,6 +1997,8 @@
 	size_t len;
 	bool no_cck;
 	bool dont_wait_for_ack;
+	int n_csa_offsets;
+	const u16 *csa_offsets;
 };
 
 /**