[IA64] fix section mismatch in arch/ia64/kernel/palinfo.c

This patch removes following warning:

	WARNING: vmlinux.o(.exit.text+0xb1): Section mismatch in
	reference from the function palinfo_exit() to the variable
	.cpuinit.data:palinfo_cpu_notifier

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>