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/triflex.c b/drivers/ide/pci/triflex.c
index be8715d..42fb98f 100644
--- a/drivers/ide/pci/triflex.c
+++ b/drivers/ide/pci/triflex.c
@@ -38,13 +38,12 @@
 {
 	ide_hwif_t *hwif = HWIF(drive);
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
-	u8 channel_offset = hwif->channel ? 0x74 : 0x70;
-	u16 timing = 0;
 	u32 triflex_timings = 0;
-	u8 unit = (drive->select.b.unit & 0x01);
-	
+	u16 timing = 0;
+	u8 channel_offset = hwif->channel ? 0x74 : 0x70, unit = drive->dn & 1;
+
 	pci_read_config_dword(dev, channel_offset, &triflex_timings);
-	
+
 	switch(speed) {
 		case XFER_MW_DMA_2:
 			timing = 0x0103;