ARM: SMP: consolidate the common parts of smp_prepare_cpus()

There is a certain amount of smp_prepare_cpus() which doesn't belong
in the platform support code - that is, code which is invariant to the
SMP implementation.  Move this code into arch/arm/kernel/smp.c, and
add a platform_ prefix to the original function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/smp.h

@@ -45,10 +45,6 @@ asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
  */
 extern void smp_init_cpus(void);
 
-/*
- * Move global data into per-processor storage.
- */
-extern void smp_store_cpu_info(unsigned int cpuid);
 
 /*
  * Raise an IPI cross call on CPUs in callmap.
@@ -72,6 +68,11 @@ asmlinkage void secondary_start_kernel(void);
  */
 extern void platform_secondary_init(unsigned int cpu);
 
+/*
+ * Initialize cpu_possible map, and enable coherency
+ */
+extern void platform_smp_prepare_cpus(unsigned int);
+
 /*
  * Initial data for bringing up a secondary CPU.
  */