BUG_ON() Conversion in drivers/net/

this changes if() BUG(); constructs to BUG_ON() which is
cleaner, contains unlikely() and can better optimized away.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

drivers/net/irda/sa1100_ir.c

@@ -695,8 +695,7 @@ static int sa1100_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
 		/*
 		 * We must not be transmitting...
 		 */
-		if (si->txskb)
-			BUG();
+		BUG_ON(si->txskb);
 
 		netif_stop_queue(dev);