add the support for delta ofdpa driver

[XiongJunDelta]

ONOS project does not use GitHub features for code contribution.

Please submit a patch to ONOS gerrit.

You will need to register to submit a patch. If you do not have ONOS project account yet, you can create one here https://onosproject.org/register/

More information about how you can contribute can be found on the wiki: https://wiki.onosproject.org/display/ONOS/Contributor+Guide