microblaze: Add missing headers caused by disintegration asm/system.h

#ifndef _ASM_MICROBLAZE_CMPXCHG_H

#define _ASM_MICROBLAZE_CMPXCHG_H

#include <linux/irqflags.h>

void __bad_xchg(volatile void *ptr, int size);

static inline unsigned long __xchg(unsigned long x, volatile void *ptr,

#include <asm/sections.h>

#include <asm/exceptions.h>

#include <asm/unwind.h>

#include <asm/switch_to.h>

struct stack_trace;