BUG_ON() Conversion in drivers/video/

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/video/ffb.c b/drivers/video/ffb.c
index 9c9b21d..7633e41 100644
--- a/drivers/video/ffb.c
+++ b/drivers/video/ffb.c
@@ -466,8 +466,7 @@
 	unsigned long flags;
 	u32 fg;
 
-	if (rect->rop != ROP_COPY && rect->rop != ROP_XOR)
-		BUG();
+	BUG_ON(rect->rop != ROP_COPY && rect->rop != ROP_XOR);
 
 	fg = ((u32 *)info->pseudo_palette)[rect->color];