[SCSI] qla1280: driver clean up

Remove some unneeded, inactive and unused code, make some trivial
corrections to comments and a printk, and return a proper status
in qla1280_queuecommand.  No fundamental logic changes are made.

Signed-off-by: Michael Reed <mdr@sgi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>