scsi: fcoe: Correct some kernel-doc issues

Mainly due to misdocumentation or bitrotted descriptions.

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

 drivers/scsi/fcoe/fcoe_transport.c:396: warning: Function parameter or member 'skb' not described in 'fcoe_check_wait_queue'
 drivers/scsi/fcoe/fcoe_transport.c:447: warning: Function parameter or member 't' not described in 'fcoe_queue_timer'
 drivers/scsi/fcoe/fcoe_transport.c:447: warning: Excess function parameter 'lport' description in 'fcoe_queue_timer'
 drivers/scsi/fcoe/fcoe_transport.c:682: warning: Function parameter or member 'netdev' not described in 'fcoe_netdev_map_lookup'

Link: https://lore.kernel.org/r/20200713074645.126138-7-lee.jones@linaro.org


Cc: Hannes Reinecke <hare@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>