ide: remove [ata_]select_t

* Use 'drive->dn & 1' in ide_init_disk().

* remove [ata_]select_t.

While at it:

* Use ATA_DEVICE_OBS define in ide_port_init_devices_data().

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index f8d8642..ecfb87c 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -495,7 +495,7 @@
 	tf->lbal    = drive->sect;
 	tf->lbam    = drive->cyl;
 	tf->lbah    = drive->cyl >> 8;
-	tf->device  = (drive->head - 1) | drive->select.all;
+	tf->device  = (drive->head - 1) | drive->select;
 	tf->command = ATA_CMD_INIT_DEV_PARAMS;
 }