scsi: fnic: Demote non-conformant kernel-doc headers

scsi: fnic: Demote non-conformant kernel-doc headers

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/fnic/fnic_scsi.c:183: warning: Function parameter or member 'fnic' not described in '__fnic_set_state_flags'
 drivers/scsi/fnic/fnic_scsi.c:183: warning: Function parameter or member 'st_flags' not described in '__fnic_set_state_flags'
 drivers/scsi/fnic/fnic_scsi.c:183: warning: Function parameter or member 'clearbits' not described in '__fnic_set_state_flags'
 drivers/scsi/fnic/fnic_scsi.c:2296: warning: Function parameter or member 'fnic' not described in 'fnic_scsi_host_start_tag'
 drivers/scsi/fnic/fnic_scsi.c:2296: warning: Function parameter or member 'sc' not described in 'fnic_scsi_host_start_tag'
 drivers/scsi/fnic/fnic_scsi.c:2316: warning: Function parameter or member 'fnic' not described in 'fnic_scsi_host_end_tag'
 drivers/scsi/fnic/fnic_scsi.c:2316: warning: Function parameter or member 'sc' not described in 'fnic_scsi_host_end_tag'

Link: https://lore.kernel.org/r/20210317091230.2912389-18-lee.jones@linaro.org
Cc: Satish Kharat <satishkh@cisco.com>
Cc: Sesidhar Baddela <sebaddel@cisco.com>
Cc: Karan Tilak Kumar <kartilak@cisco.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>