[IA64] acpi.c: export pm_power_off for use by ipmi_poweroff module.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/acpi.c

@@ -61,6 +61,7 @@
 void (*pm_idle) (void);
 EXPORT_SYMBOL(pm_idle);
 void (*pm_power_off) (void);
+EXPORT_SYMBOL(pm_power_off);
 
 unsigned char acpi_kbd_controller_present = 1;
 unsigned char acpi_legacy_devices;