ath9k: move the sequence number from ath_frame_info to ath_buf

It is only necessary for BAW tracking and moving it to the ath_buf
makes it easier to add further improvements, such as deferring
seqno allocation in the aggregation path.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index eb4cdef..5d9a9aa 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -211,12 +211,12 @@
 	enum ath9k_key_type keytype;
 	u8 keyix;
 	u8 retries;
-	u16 seqno;
 };
 
 struct ath_buf_state {
 	u8 bf_type;
 	u8 bfs_paprd;
+	u16 seqno;
 	unsigned long bfs_paprd_timestamp;
 };