* Make ide_build_sglist() and ide_destroy_dmatable() available also when
  CONFIG_BLK_DEV_IDEDMA_PCI=n.

* Use ide_build_sglist() and ide_destroy_dmatable() in {ics,au1xxx-}ide.c
  and remove no longer needed {ics,au}ide_build_sglist().

There should be no functionality changes caused by this patch.

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>