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/scc_pata.c b/drivers/ide/scc_pata.c
index 5be41f2..9e3aef3 100644
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -567,7 +567,6 @@
 		hw.io_ports_array[i] = ports->dma + 0x20 + i * 4;
 	hw.irq = dev->irq;
 	hw.dev = &dev->dev;
-	hw.chipset = ide_pci;
 
 	rc = ide_host_add(d, hws, &host);
 	if (rc)
@@ -823,6 +822,7 @@
 	.host_flags	= IDE_HFLAG_SINGLE,
 	.irq_flags	= IRQF_SHARED,
 	.pio_mask	= ATA_PIO4,
+	.chipset	= ide_pci,
 };
 
 /**