scsi: bnx2i: Add parameter description and rename another

scsi: bnx2i: Add parameter description and rename another

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

 drivers/scsi/bnx2i/bnx2i_iscsi.c:1288: warning: Function parameter or member 'cmds_max' not described in 'bnx2i_session_create'
 drivers/scsi/bnx2i/bnx2i_iscsi.c:2176: warning: Function parameter or member 'params' not described in 'bnx2i_nl_set_path'
 drivers/scsi/bnx2i/bnx2i_iscsi.c:2176: warning: Excess function parameter 'buf' description in 'bnx2i_nl_set_path'

Link: https://lore.kernel.org/r/20200723122446.1329773-40-lee.jones@linaro.org
Cc: QLogic-Storage-Upstream@qlogic.com
Cc: Anil Veerabhadrappa <anilgv@broadcom.com>
Cc: Eddie Wai <eddie.wai@broadcom.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>