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/icside.c b/drivers/ide/icside.c
index 36da913..6352a44 100644
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -398,11 +398,11 @@
 
 	hw->irq = ec->irq;
 	hw->dev = &ec->dev;
-	hw->chipset = ide_acorn;
 }
 
 static const struct ide_port_info icside_v5_port_info = {
 	.host_flags		= IDE_HFLAG_NO_DMA,
+	.chipset		= ide_acorn,
 };
 
 static int __devinit
@@ -457,6 +457,7 @@
 	.host_flags		= IDE_HFLAG_SERIALIZE | IDE_HFLAG_MMIO,
 	.mwdma_mask		= ATA_MWDMA2,
 	.swdma_mask		= ATA_SWDMA2,
+	.chipset		= ide_acorn,
 };
 
 static int __devinit