Currenty pcmcia drivers do a loop on their devices for issuing a
SCSI_IOCTL_GET_IDLUN ioctl from kernelspace and passing dev->type
to userspace so cardmgr can guess the the dev_t and find the
device node of it.

But it doesn't actually use it but only pass it as optional arguments
to it's poor-man's hotplug scripts.  So kill this horror of, we
have proper hotplug scripts in 2.5.  And here we go, the first big
host->my_devices abuser is gone.