ide: remove IDE_*_REG macros

* Add IDE_{ALTSTATUS,IREASON,BCOUNTL,BCOUNTH}_OFFSET defines.

* Remove IDE_*_REG macros - this results in more readable
  and slightly smaller code.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index bfdc4f4..8c39146 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1117,10 +1117,10 @@
 		return ide_do_reset(drive);
 	}
 	/* Get the number of bytes to transfer on this interrupt. */
-	bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
-		  hwif->INB(IDE_BCOUNTL_REG);
+	bcount = (hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]) << 8) |
+		  hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
 
-	ireason = hwif->INB(IDE_IREASON_REG);
+	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
 
 	if (ireason & CD) {
 		printk(KERN_ERR "ide-tape: CoD != 0 in %s\n", __func__);
@@ -1224,12 +1224,12 @@
 				"yet DRQ isn't asserted\n");
 		return startstop;
 	}
-	ireason = hwif->INB(IDE_IREASON_REG);
+	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
 	while (retries-- && ((ireason & CD) == 0 || (ireason & IO))) {
 		printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while issuing "
 				"a packet command, retrying\n");
 		udelay(100);
-		ireason = hwif->INB(IDE_IREASON_REG);
+		ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
 		if (retries == 0) {
 			printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while "
 					"issuing a packet command, ignoring\n");
@@ -1323,7 +1323,7 @@
 				    IDETAPE_WAIT_CMD, NULL);
 		return ide_started;
 	} else {
-		hwif->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
+		hwif->OUTB(WIN_PACKETCMD, hwif->io_ports[IDE_COMMAND_OFFSET]);
 		return idetape_transfer_pc(drive);
 	}
 }