ARM: Add API to detect SCU base address from CP15

#define SCU_PM_POWEROFF	3

#ifndef __ASSEMBLER__

#include <asm/cputype.h>

static inline bool scu_a9_has_base(void)

{

	return read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9;

}

static inline unsigned long scu_a9_get_base(void)

{

	unsigned long pa;

	asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (pa));

	return pa;

}

unsigned int scu_get_core_count(void __iomem *);

void scu_enable(void __iomem *);

int scu_power_mode(void __iomem *, unsigned int);