scsi: aic94xx: Document 'lseq' and repair asd_update_port_links() header

scsi: aic94xx: Document 'lseq' and repair asd_update_port_links() header

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

 drivers/scsi/aic94xx/aic94xx_seq.c:587: warning: Function parameter or member 'lseq' not described in 'asd_init_lseq_mip'
 drivers/scsi/aic94xx/aic94xx_seq.c:674: warning: Function parameter or member 'lseq' not described in 'asd_init_lseq_mdp'
 drivers/scsi/aic94xx/aic94xx_seq.c:958: warning: Function parameter or member 'lseq' not described in 'asd_init_lseq_cio'
 drivers/scsi/aic94xx/aic94xx_seq.c:1364: warning: Function parameter or member 'asd_ha' not described in 'asd_update_port_links'
 drivers/scsi/aic94xx/aic94xx_seq.c:1364: warning: Function parameter or member 'phy' not described in 'asd_update_port_links'
 drivers/scsi/aic94xx/aic94xx_seq.c:1364: warning: Excess function parameter 'sas_phy' description in 'asd_update_port_links'

Link: https://lore.kernel.org/r/20200713080001.128044-7-lee.jones@linaro.org
Cc: Luben Tuikov <luben_tuikov@adaptec.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>