x86: use WARN() in arch/x86/mm/ioremap.c

Use WARN() instead of a printk+WARN_ON() pair; this way the message
becomes part of the warning section for better reporting/collection.
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
Cc: akpm@linux-foundation.org
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/mm/ioremap.c

@@ -553,13 +553,11 @@ static int __init check_early_ioremap_leak(void)
 {
 	if (!early_ioremap_nested)
 		return 0;
-
-	printk(KERN_WARNING
+	WARN(1, KERN_WARNING
 	       "Debug warning: early ioremap leak of %d areas detected.\n",
 		early_ioremap_nested);
 	printk(KERN_WARNING
 		"please boot with early_ioremap_debug and report the dmesg.\n");
-	WARN_ON(1);
 
 	return 1;
 }