[B43]: Fix sparse warnings.

The remaining warning in phy.c will be fixed later.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/b43/pio.h b/drivers/net/wireless/b43/pio.h
index 46d6d2e..34a44c1 100644
--- a/drivers/net/wireless/b43/pio.h
+++ b/drivers/net/wireless/b43/pio.h
@@ -39,10 +39,9 @@
 	struct sk_buff *skb;
 	struct ieee80211_tx_status txstat;
 	struct list_head list;
+	u16 index; /* Index in the tx_packets_cache */
 };
 
-#define pio_txpacket_getindex(packet) ((int)((packet) - (packet)->queue->tx_packets_cache))
-
 struct b43_pioqueue {
 	struct b43_wldev *dev;
 	u16 mmio_base;