ath9k: Fix RX debug statistics

The various error bits that ath_debug_stat_rx()
checks are valid only for the last descriptor for
a chained packet, handle this correctly.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/recv.c

@@ -1084,6 +1084,7 @@ static int ath9k_rx_skb_preprocess(struct ath_softc *sc,
 		return 0;
 
 	ath9k_process_tsf(rx_stats, rx_status, tsf);
+	ath_debug_stat_rx(sc, rx_stats);
 
 	/*
 	 * Process PHY errors and return so that the packet
@@ -1270,8 +1271,6 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 		    !ieee80211_is_qos_nullfunc(hdr->frame_control))
 			sc->rx.num_pkts++;
 
-		ath_debug_stat_rx(sc, &rs);
-
 		rxs = IEEE80211_SKB_RXCB(hdr_skb);
 		memset(rxs, 0, sizeof(struct ieee80211_rx_status));