Version 1.2.0 with support for xorg-server 1.10-1.19 has been released: https://lists.x.org/archives/xorg-announce/2016-November/002741.html
commit b1aab531b7d01d77999a7ad1d209e0357f7bbcf4 Author: Lars Wendler <polynomial-c@gentoo.org> Date: Thu Nov 17 14:48:23 2016 x11-drivers/xf86-video-amdgpu: Bump to version 1.2.0 (bug #600100). Package-Manager: portage-2.3.2