ARM: SAMSUNG: Constify iomem address passed to s5p_init_cpu

The iomem passed to s5p_init_cpu is used as read-only.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

arch/arm/plat-samsung/cpu.c

@@ -44,7 +44,7 @@ void __init s3c64xx_init_cpu(void)
 	pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
 }
 
-void __init s5p_init_cpu(void __iomem *cpuid_addr)
+void __init s5p_init_cpu(const void __iomem *cpuid_addr)
 {
 	samsung_cpu_id = readl_relaxed(cpuid_addr);
 	samsung_cpu_rev = samsung_cpu_id & 0xFF;

arch/arm/plat-samsung/include/plat/cpu.h

@@ -113,7 +113,7 @@ extern void s3c_init_cpu(unsigned long idcode,
 extern void s3c24xx_init_io(struct map_desc *mach_desc, int size);
 
 extern void s3c64xx_init_cpu(void);
-extern void s5p_init_cpu(void __iomem *cpuid_addr);
+extern void s5p_init_cpu(const void __iomem *cpuid_addr);
 
 extern unsigned int samsung_rev(void);