- qlogicfc.c abuses SCSI_TIEMOUT although it's not part of the scsi
   core, give it it's own ISP_TIMEOUT define
 - avoid redefining timeouts #ifdef DEBUG, that's a cause for heisenbugs
   just waiting to happen
 - now SCSI_TIMEOUT is private to scsi_scan.c, move it there
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>