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/rapide.c b/drivers/ide/rapide.c
index d5003ca..bd4d7a8 100644
--- a/drivers/ide/rapide.c
+++ b/drivers/ide/rapide.c
@@ -13,6 +13,7 @@
 
 static const struct ide_port_info rapide_port_info = {
 	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
+	.chipset		= ide_generic,
 };
 
 static void rapide_setup_ports(hw_regs_t *hw, void __iomem *base,
@@ -49,7 +50,6 @@
 
 	memset(&hw, 0, sizeof(hw));
 	rapide_setup_ports(&hw, base, base + 0x818, 1 << 6, ec->irq);
-	hw.chipset = ide_generic;
 	hw.dev = &ec->dev;
 
 	ret = ide_host_add(&rapide_port_info, hws, &host);