I would said it should work relatively the same, first you would have to identity what amd driver you are using, type lsmod in a terminal and check if you find a "radeon" or a "amdgpu" ( i think the free driver is amdgpu now ) and then create the corresponding file :
sudo gedit /etc/X11/xorg.conf.d/20-amdgpu.conf
Section "Device"
Identifier "AMD"
Driver "amdgpu"
Option "TearFree" "true"
EndSection
As Christop3 said you can also add the option - Option "TripleBuffer" "true" - that can help and make the vsync smoother