ide: add struct ide_port_ops (take 2)

* Move hooks for port/host specific methods from ide_hwif_t to
  'struct ide_port_ops'.

* Add 'const struct ide_port_ops *port_ops' to 'struct ide_port_info'
  and ide_hwif_t.

* Update host drivers and core code accordingly.

While at it:

* Rename ata66_*() cable detect functions to *_cable_detect() to match
  the standard naming. (Suggested by Sergei Shtylyov)

v2:
* Fix build for bast-ide. (Noticed by Andrew Morton)

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/arm/bast-ide.c

@@ -56,7 +56,7 @@ static int __init bastide_register(unsigned int base, unsigned int aux, int irq)
 
 	ide_init_port_hw(hwif, &hw);
 	hwif->mmio = 1;
-	hwif->quirkproc = NULL;
+	hwif->port_ops = NULL;
 
 	idx[0] = i;