per jgarzik's suggestion

Define it in <asm/ide.h> if ide_default_io_base(),
ide_default_irq() and ide_init_default_irq() are needed.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>