[SCSI] fcoe: clean up TBD comments in FCoE prototype header

Some old comments in fc_fcoe.h say TBD long after the
standard has been passed by T11.  Clean them up.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>