lib/debugobjects.c: convert printk(KERN_DEBUG to pr_debug

Direct conversion of one KERN_DEBUG message without DEBUG definition
(suggested by Josh Triplett)

That message will now be disabled by default. (see
Documentation/CodingStyle Chapter 13)

Signed-off-by: Fabian Frederick <[e-mail]>
Reviewed-by: Josh Triplett <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

lib/debugobjects.c

···
 	}
 	local_irq_enable();
 
-	printk(KERN_DEBUG "ODEBUG: %d of %d active objects replaced\n", cnt,
-	       obj_pool_used);
+	pr_debug("%d of %d active objects replaced\n",
+		 cnt, obj_pool_used);
 	return 0;
 free:
 	hlist_for_each_entry_safe(obj, tmp, &objects, node) {