There is not direct opposite term for it. Third person footage is more common and you won´t find anyone classify a pornographic movie with "NON-POV" or "Third-Person".
Hope your next question won´t be if there is a opposite for "HD" ...
Well it depends on where you search. In some boards there might be an "advanced search" where you can specify words which should not occur in the matches. If you search in google than you can use the minus sign before words which were otherwise white-space separated to specify that they should not occur in the matches.
For example to search 'jaguar velocity -car' would include results where there occurs the word jaguar and velocity but not the word car. There are also other other modifiers.
Read the documentation from google for how they interact with each other.
But since almost all porn is third person shooted i wonder why this is a problem at all. I doubt that you are getting spammed with pov in your search results.