[SCSI] aacraid: remove unused or deprecated firmware constants

Just sweeping the floor clean in one spot. Some of these constants have
never been used in the driver or in the firmware (and thus are
meaningless). Triggered this patch because I discovered one of the
unused constants was actually incorrect and figured it was better to
clean them out than correct and update. There are no side effects at all
regarding this patch, it is purely cosmetic.

Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>