x86: traps.c fix style problems

Impact: cleanup

Fix:

 WARNING: Use #include <linux/nmi.h> instead of <asm/nmi.h>
 WARNING: Use #include <linux/smp.h> instead of <asm/smp.h>
 WARNING: Use #include <linux/io.h> instead of <asm/io.h>

 total: 0 errors, 3 warnings
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/traps.c

@@ -65,9 +65,6 @@
 #else
 #include <asm/processor-flags.h>
 #include <asm/arch_hooks.h>
-#include <asm/nmi.h>
-#include <asm/smp.h>
-#include <asm/io.h>
 #include <asm/traps.h>
 
 #include "cpu/mcheck/mce.h"