Are PS4 controllers region locked for any odd reason?
Solution 1:
No, they aren't, as was confirmed before release. I'm not sure a controller has ever been region locked actually, and the PS4 is completely region free for games.
Solution 2:
If you look at this site this comes directly from Playstations FAQ
There are no region locks with games nor hardware
http://www.siliconera.com/2013/10/30/massive-playstation-4-faq-answers-questions/