ata: Replace BUG() with BUG_ON().

Replace BUG() with BUG_ON().
Caught by coccinelle.
Signed-off-by: NHarman Kalra <harman4linux@gmail.com>
Signed-off-by: NTejun Heo <tj@kernel.org>

drivers/ata/pata_octeon_cf.c

@@ -152,8 +152,7 @@ static void octeon_cf_set_piomode(struct ata_port *ap, struct ata_device *dev)
 		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)