Always compile ide-dma.c if CONFIG_BLK_DEV_IDEDMA=y, mark PCI specific code
with CONFIG_BLK_DEV_IDEDMA_PCI for now (it should migrate to ide_pcidma.c
over a time).  This fixes a small bug - in_drive_list() from icside.c used
!strstr() instead of strstr() so it was missing two entries from a blacklist.