scsi: MAINTAINERS: change FCoE list to linux-scsi

fcoe-devel@open-fcoe.org is defunct and all patches are routed via the
SCSI tree anyways.

So update MAINTAINERS accordingly.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>