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>
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 727a671..f17ba19 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1048,8 +1048,7 @@
 {
 	hwif->channel = port;
 
-	if (d->chipset)
-		hwif->chipset = d->chipset;
+	hwif->chipset = d->chipset ? d->chipset : ide_pci;
 
 	if (d->init_iops)
 		d->init_iops(hwif);
@@ -1178,7 +1177,6 @@
 {
 	memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
 	hwif->irq = hw->irq;
-	hwif->chipset = hw->chipset;
 	hwif->dev = hw->dev;
 	hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
 	hwif->ack_intr = hw->ack_intr;