scsi: csiostor: Demote kerneldoc that fails to meet the criteria

scsi: csiostor: Demote kerneldoc that fails to meet the criteria

This matches some of the other headers in the file.

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

 drivers/scsi/csiostor/csio_lnode.c:2079: warning: Function parameter or member 'hw' not described in 'csio_lnode_init'
 drivers/scsi/csiostor/csio_lnode.c:2079: warning: Function parameter or member 'pln' not described in 'csio_lnode_init'

Link: https://lore.kernel.org/r/20200721164148.2617584-35-lee.jones@linaro.org
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: linux-media@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>