x86: make early_ioremap_debug early_param

This patch makes "early_ioremap_debug" a early parameter, because
"early_ioreamp/early_iounmap" is only used during early boot stage.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/mm/ioremap_32.c

@@ -215,9 +215,9 @@ static int __init early_ioremap_debug_setup(char *str)
 {
 	early_ioremap_debug = 1;
 
-	return 1;
+	return 0;
 }
-__setup("early_ioremap_debug", early_ioremap_debug_setup);
+early_param("early_ioremap_debug", early_ioremap_debug_setup);
 
 static __initdata int after_paging_init;
 static __initdata unsigned long bm_pte[1024]