ide: remove chipset field from hw_regs_t

* Convert host drivers that still use hw_regs_t's chipset field to use
  the one in struct ide_port_info instead.

* Move special handling of ide_pci chipset type from ide_hw_configure()
  to ide_init_port().

* Remove chipset field from hw_regs_t.

While at it:
- remove stale comment in delkin_cb.c

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/palm_bk3710.c

@@ -306,6 +306,7 @@ static struct ide_port_info __devinitdata palm_bk3710_port_info = {
 	.host_flags		= IDE_HFLAG_MMIO,
 	.pio_mask		= ATA_PIO4,
 	.mwdma_mask		= ATA_MWDMA2,
+	.chipset		= ide_palm3710,
 };
 
 static int __init palm_bk3710_probe(struct platform_device *pdev)
@@ -363,7 +364,6 @@ static int __init palm_bk3710_probe(struct platform_device *pdev)
 			(base + IDE_PALM_ATA_PRI_CTL_OFFSET);
 	hw.irq = irq->start;
 	hw.dev = &pdev->dev;
-	hw.chipset = ide_palm3710;
 
 	palm_bk3710_port_info.udma_mask = rate < 100000000 ? ATA_UDMA4 :
 							     ATA_UDMA5;