b43legacy: fix build errors when DMA or PIO are not selected

Currently, b43legacy is broken due to

commit fbad4598ca826b994d0fd4ce3deebc9cd1960b31
Author: Johannes Berg <johannes@sipsolutions.net>
Date:   Thu May 15 12:55:29 2008 +0200

    mac80211: move TX info into skb->cb

when compiled with only PIO or only DMA because I forgot to update two
stubs. This patch fixes it.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43legacy/dma.h

@@ -321,8 +321,7 @@ void b43legacy_dma_get_tx_stats(struct b43legacy_wldev *dev,
 }
 static inline
 int b43legacy_dma_tx(struct b43legacy_wldev *dev,
-		     struct sk_buff *skb,
-		     struct ieee80211_tx_control *ctl)
+		     struct sk_buff *skb)
 {
 	return 0;
 }

drivers/net/wireless/b43legacy/pio.h

@@ -130,8 +130,7 @@ void b43legacy_pio_free(struct b43legacy_wldev *dev)
 }
 static inline
 int b43legacy_pio_tx(struct b43legacy_wldev *dev,
-		   struct sk_buff *skb,
-		   struct ieee80211_tx_control *ctl)
+		   struct sk_buff *skb)
 {
 	return 0;
 }