I have moved this thread to the BF4 EN forums now, carry on.
On the topic, see this page here for account linking and how to do it: https://help.ea.com/en-us/help/account/linking-your-origin-account-with-your-psn-id-and-gamertag . Once done this should technically allow you to show your PC and PS4 soldier under the same Battlelog profile. Do note, if you are using two EA Accounts and that is why you dont have this already, then sadly there is no way to do this but a persona transfer: https://help.ea.com/en-us/help/account/linking-accounts-and-persona-transfers . But that is an extremely riskly process and not recommended, but its your choice I guess.
If you are only using one EA Account however and one PS4 account and even after linking nothing happens, contact support and follow this steps here: https://help.ea.com/en-us/help/faq/contact-ea-help .
