Mounting a TV on non-load bearing wall
So long as the lags make it into a stud or multiple studs (presuming it is a wood frame house) if the mount is that large, any wall  should be fine. Load bearing walls are not needed for mounting a tv They ARE needed for supporting a higher floor(s) and/or roof; that is the load they are bearing.

The keys to successful wall mounting are following directions and ensuring the mount is rated strong enough for your tv.