[PATCH] ide: fix the BLK_DEV_IDEDMA_PCI dependency for drivers/ide/ppc/pmac.c

drivers/ide/ppc/pmac.c uses symbols ide_build_sglist,
__ide_dma_off_quietly, __ide_dma_on and __ide_dma_timeout when
CONFIG_BLK_DEV_IDEDMA_PMAC is defined. The declarations for these
symbols (in ide.h) depend on CONFIG_BLK_DEV_IDEDMA_PCI. There is a
missing dependency for this in drivers/ide/Kconfig which causes
drivers/ide/ppc/pmac.c to fail to build if CONFIG_BLK_DEV_IDEDMA_PMAC
is selected but CONFIG_BLK_DEV_IDEDMA_PCI is not.

Signed-off-by: Juha-Matti Tapio <jmtapio@verkkotelakka.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>