b43: use ieee80211_rx_ni()

Convert to new use ieee80211_rx_ni() routine rather than open-coded
version.
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/xmit.c

@@ -690,10 +690,7 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
 	}
 
 	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
-
-	local_bh_disable();
-	ieee80211_rx(dev->wl->hw, skb);
-	local_bh_enable();
+	ieee80211_rx_ni(dev->wl->hw, skb);
 
 #if B43_DEBUG
 	dev->rx_count++;