ata: Replace BUG() with BUG_ON().

Replace BUG() with BUG_ON().
Caught by coccinelle.

Signed-off-by: Harman Kalra <harman4linux@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/ata/pata_octeon_cf.c b/drivers/ata/pata_octeon_cf.c
index 2724595..475a006 100644
--- a/drivers/ata/pata_octeon_cf.c
+++ b/drivers/ata/pata_octeon_cf.c
@@ -152,8 +152,7 @@
 		div = 8;
 	T = (int)((1000000000000LL * div) / octeon_get_io_clock_rate());
 
-	if (ata_timing_compute(dev, dev->pio_mode, &timing, T, T))
-		BUG();
+	BUG_ON(ata_timing_compute(dev, dev->pio_mode, &timing, T, T));
 
 	t1 = timing.setup;
 	if (t1)