[IA64] SN fix for cpu hotplug/kexec

The sn_cpu_init() is required for cpu initialization on SN platforms.
Change __init to __cpuinit so that the function is not freed with init code/data.

Signed-off-by: Jack Steiner <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

arch/ia64/sn/kernel/setup.c

···
  * Also sets up a few fields in the nodepda.  Also known as
  * platform_cpu_init() by the ia64 machvec code.
  */
-void __init sn_cpu_init(void)
+void __cpuinit sn_cpu_init(void)
 {
 	int cpuid;
 	int cpuphyid;