[SCSI] hptiop: backout ioctl mess

The hptiop just got merged with a horrible amount of really bad ioctl
code that is against the standards for new scsi drivers.  This patch
backs it out (and fixes a small bug where scsi_add_host is called to
early).  We can re-add proper APIs once we agree on them.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>