ide: simplify 'struct ide_taskfile'

Make 'struct ide_taskfile' cover only 8 register values and thus put two such
fields ('tf' and 'hob') into 'struct ide_cmd', dropping unnecessary 'tf_array'
field from it.

This required changing the prototype of ide_get_lba_addr() and ide_tf_dump().

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
[bart: fix setting of ATA_LBA bit for LBA48 commands in __ide_do_rw_disk()]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 99bb0a9..e71c72b 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -86,8 +86,8 @@
 
 		tp_ops->input_data(drive, cmd, data, 2);
 
-		tf->data = data[0];
-		tf->hob_data = data[1];
+		cmd->tf.data  = data[0];
+		cmd->hob.data = data[1];
 	}
 
 	tp_ops->tf_read(drive, cmd);
@@ -97,7 +97,7 @@
 		if (tf->lbal != 0xc4) {
 			printk(KERN_ERR "%s: head unload failed!\n",
 			       drive->name);
-			ide_tf_dump(drive->name, tf);
+			ide_tf_dump(drive->name, cmd);
 		} else
 			drive->dev_flags |= IDE_DFLAG_PARKED;
 	}