ath9k: Fix RX filters in channel contexts

Maintain the RX filter on a per-channel-context
basis and not globally. Not doing so was resulting
in incorrect filter calculation.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
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 12cdabb..4f3da18 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -314,7 +314,6 @@
 	bool discard_next;
 	u32 *rxlink;
 	u32 num_pkts;
-	unsigned int rxfilter;
 	struct list_head rxbuf;
 	struct ath_descdma rxdma;
 	struct ath_rx_edma rx_edma[ATH9K_RX_QUEUE_MAX];
@@ -350,6 +349,8 @@
 	bool active;
 	bool assigned;
 	bool switch_after_beacon;
+
+	unsigned int rxfilter;
 };
 
 enum ath_chanctx_event {