ide: fix ide_port_scan() to do ACPI setup after initializing request queues

This makes ide_port_scan()'s behavior match ide_host_register()'s
one and fixes OOPS in elv_may_queue() during port re-scan.
Reported-and-tested-by: NBruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-probe.c

@@ -1694,8 +1694,8 @@ void ide_port_scan(ide_hwif_t *hwif)
 	hwif->present = 1;
 
 	ide_port_tune_devices(hwif);
-	ide_acpi_port_init_devices(hwif);
 	ide_port_setup_devices(hwif);
+	ide_acpi_port_init_devices(hwif);
 	hwif_register_devices(hwif);
 	ide_proc_port_register_devices(hwif);
 }