macbook21: Add CST entries

Change-Id: I9e8628d879a193e2f6ba561ee17f24ae94435e1a
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6693
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
1 file changed