scsi: lpfc: Fix lpfc_sli4_read_config return value check

An error is an error - but not to the existing return value check.

Revise check to handle any failure, not just EIO.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>