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/au1xxx-ide.c b/drivers/ide/au1xxx-ide.c
index 4601364..9b31f83 100644
--- a/drivers/ide/au1xxx-ide.c
+++ b/drivers/ide/au1xxx-ide.c
@@ -499,6 +499,7 @@
 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 	.mwdma_mask		= ATA_MWDMA2,
 #endif
+	.chipset		= ide_au1xxx,
 };
 
 static int au_ide_probe(struct platform_device *dev)
@@ -548,7 +549,6 @@
 	auide_setup_ports(&hw, ahwif);
 	hw.irq = ahwif->irq;
 	hw.dev = &dev->dev;
-	hw.chipset = ide_au1xxx;
 
 	ret = ide_host_add(&au1xxx_port_info, hws, &host);
 	if (ret)