Yes you can upgrade to any of those versions. As long as you are under maintenance you are all set.
You will need to log into the SYMC portal and make sure you have registered your license for DLP.
https://licensing.symantec.com/acctmgmt/help/LicensingPortalFAQ.jsp
https://www.symantec.com/support-center/upgrading-products
You can then request the upgrade license key. When you get the license key, there will be the license number and you can then download those upgrade files from
fileconnect.symantec.com
You can also request this information from your SYMC sales rep.
Ronak