BUG_ON() Conversion in drivers/block/

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>
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 862b9ab..b6ea2f0 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -906,8 +906,7 @@
 	if (!creq)
 		goto startio;
 
-	if (creq->nr_phys_segments > SG_MAX)
-		BUG();
+	BUG_ON(creq->nr_phys_segments > SG_MAX);
 
 	if ((c = cmd_alloc(h,1)) == NULL)
 		goto startio;