[SCSI] fcoe: don't export functions that are internal to fcoe

These probably never should have been exported.
If they were needed outside of the fcoe module, they
would have been moved to libfcoe.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>