ath9k: add Block ACK bitmap in sample debug

this represents the bitmap of block ACK received after the
successful transmission of an aggregate frame. also made few
changes to beautify the display

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/debug.h b/drivers/net/wireless/ath/ath9k/debug.h
index 39f89bc..b93e88b 100644
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -196,6 +196,8 @@
 		u8 rateindex;
 		u8 qid;
 		u8 tid;
+		u32 ba_low;
+		u32 ba_high;
 	} ts[ATH_DBG_MAX_SAMPLES];
 	struct {
 		u64 jiffies;