MAINTAINERS: Change FCoE maintainer

Vasu is going to resign from his maintainer role and I'll take over.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>