[SCSI] fcoe: renames libfcoe.c to fcoe.c as the only fcoe module file

Renames libfcoe.c to fcoe.c, fcoe.c becomes the only
.c file for fcoe.ko.

Also deleted "$Id: Makefile" from fcoe module Makefle.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>