mac80211: allow to transmit A-MSDU within A-MPDU

Advertise the capability to send A-MSDU within A-MPDU
in the AddBA request sent by mac80211. Let the driver
know about the peer's capabilities.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index b087c71..d5ded87 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -133,6 +133,7 @@
  * @buf_size: reorder buffer size at receiver
  * @failed_bar_ssn: ssn of the last failed BAR tx attempt
  * @bar_pending: BAR needs to be re-sent
+ * @amsdu: support A-MSDU withing A-MDPU
  *
  * This structure's lifetime is managed by RCU, assignments to
  * the array holding it must hold the aggregation mutex.
@@ -158,6 +159,7 @@
 
 	u16 failed_bar_ssn;
 	bool bar_pending;
+	bool amsdu;
 };
 
 /**