scsi: myrs: Fix the processor absent message in processor_show()

If both processors are absent then it's supposed to print that, but
instead we print that just the second processor is absent.

Fixes: 77266186

 ("scsi: myrs: Add Mylex RAID controller (SCSI interface)")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>