[PATCH] small lasi700 update

[PATCH] small lasi700 update

 - move the struct parisc_driver down like in most drivers, avoids
   two forward-declarations
 - give lasi700_scsi_tbl and lasi700_driver_callback sensible names
 - properly return -ENOMEM instead of 1 on kmalloc failure
 - check scsi_add_host return value