ide: use 'drive->dn & 1' instead of drive->select.b.unit

* Call ide_port_init_devices() in ide_host_register()
  also if 'struct ide_port_info *d' is not available.

* Init drive->dn in ide_port_init_devices() instead of
  ide_probe_port() so it is valid also in ->init_dev.

* Pass device number to ide_dev_apply_params().

* Use 'drive->dn & 1' instead of drive->select.b.unit.

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c
index e7475ba..c294b19 100644
--- a/drivers/ide/pci/aec62xx.c
+++ b/drivers/ide/pci/aec62xx.c
@@ -115,7 +115,7 @@
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
 	struct ide_host *host	= pci_get_drvdata(dev);
 	struct chipset_bus_clock_list_entry *bus_clock = host->host_priv;
-	u8 unit		= (drive->select.b.unit & 0x01);
+	u8 unit			= drive->dn & 1;
 	u8 tmp1 = 0, tmp2 = 0;
 	u8 ultra = 0, drive_conf = 0, ultra_conf = 0;
 	unsigned long flags;