drivers/net/wireless/ath/ath6kl/hif.c: drop if around WARN_ON

Just use WARN_ON rather than an if containing only WARN_ON(1).

A simplified version of the semantic patch that makes this transformation
is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e;
@@
- if (e) WARN_ON(1);
+ WARN_ON(e);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath6kl/hif.c

@@ -338,8 +338,7 @@ static int ath6kl_hif_proc_err_intr(struct ath6kl_device *dev)
 	status = hif_read_write_sync(dev->ar, ERROR_INT_STATUS_ADDRESS,
 				     reg_buf, 4, HIF_WR_SYNC_BYTE_FIX);
 
-	if (status)
-		WARN_ON(1);
+	WARN_ON(status);
 
 	return status;
 }
@@ -383,8 +382,7 @@ static int ath6kl_hif_proc_cpu_intr(struct ath6kl_device *dev)
 	status = hif_read_write_sync(dev->ar, CPU_INT_STATUS_ADDRESS,
 				     reg_buf, 4, HIF_WR_SYNC_BYTE_FIX);
 
-	if (status)
-		WARN_ON(1);
+	WARN_ON(status);
 
 	return status;
 }