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/q40ide.c b/drivers/ide/q40ide.c
index c793466..7488d4f 100644
--- a/drivers/ide/q40ide.c
+++ b/drivers/ide/q40ide.c
@@ -70,8 +70,6 @@
 
 	hw->irq = irq;
 	hw->ack_intr = ack_intr;
-
-	hw->chipset = ide_generic;
 }
 
 static void q40ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
@@ -119,6 +117,7 @@
 	.tp_ops			= &q40ide_tp_ops,
 	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
 	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_generic,
 };
 
 /*