Remove the racy try_irq/check_irq/undo_irq interface, and try to register the
correct handler directly in pcmcia_request_irq().  Also, simplify the IRQ
usage database, but avoid using the same IRQ twice.
Signed-off-by: Dominik Brodowski <linux@brodo.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>