They have removed it in a new driver. And it is hidden from users.
You can install it with Omega 14.12. I'm making use of it while running Crimson 15.11 (and more recently 16.7.2). I don't understand why AMD stopped including it, AMD video decoder is the most energy efficient decoder option i have found to decode my DTV content - Not sure why AMD makes people go back to Omega 14.12 to enable this functionality?