Fix FreeBSD,DragonFly preprocessor patch

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
cddl/Makefile: usr.sbin - not yet

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
cdd/*/Makefile: dont try and link in geom

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>