MN10300: BUG to BUG_ON changes

Signed-off-by: Stoyan Gaydarov <stoyboyker@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/arch/mn10300/kernel/irq.c b/arch/mn10300/kernel/irq.c
index e2d5ed8..b5b970d 100644
--- a/arch/mn10300/kernel/irq.c
+++ b/arch/mn10300/kernel/irq.c
@@ -159,8 +159,7 @@
 	int irq;
 
 	sp = current_stack_pointer();
-	if (sp - (sp & ~(THREAD_SIZE - 1)) < STACK_WARN)
-		BUG();
+	BUG_ON(sp - (sp & ~(THREAD_SIZE - 1)) < STACK_WARN);
 
 	/* make sure local_irq_enable() doesn't muck up the interrupt priority
 	 * setting in EPSW */