parisc: machine_power_off() should call pm_power_off()

Signed-off-by: Helge Deller <[e-mail]>
Tested-by: Matt Turner <[e-mail]>

arch/parisc/kernel/process.c

···
 	pdc_soft_power_button(0);
 	
 	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
+
+	/* ipmi_poweroff may have been installed. */
+	if (pm_power_off)
+		pm_power_off();
 		
 	/* It seems we have no way to power the system off via
 	 * software. The user has to press the button himself. */
···
 	for (;;);
 }
 
-void (*pm_power_off)(void) = machine_power_off;
+void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
 void flush_thread(void)