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: Arjan van de Ven <[e-mail]>
Cc: [e-mail]
Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/mm/ioremap.c

···
 {
 	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);
+		early_ioremap_nested);
 	printk(KERN_WARNING
-	       "please boot with early_ioremap_debug and report the dmesg.\n");
-	WARN_ON(1);
+		"please boot with early_ioremap_debug and report the dmesg.\n");
 
 	return 1;
 }