mips: Use do_kernel_power_off()

Kernel now supports chained power-off handlers. Use do_kernel_power_off()
that invokes chained power-off handlers. It also invokes legacy
pm_power_off() for now, which will be removed once all drivers will
be converted to the new sys-off API.

Acked-by: Thomas Bogendoerfer <[e-mail]>
Reviewed-by: Michał Mirosław <[e-mail]>
Signed-off-by: Dmitry Osipenko <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>

arch/mips/kernel/reset.c

···
 
 void machine_power_off(void)
 {
-	if (pm_power_off)
-		pm_power_off();
+	do_kernel_power_off();
 
 #ifdef CONFIG_SMP
 	preempt_disable();