radv: Set partial_vs_wave even for parts without distributed tess.
Distributed tessellation for radv is only set for 4-SE parts. Also, looking at -pro we need to enable it with tess disabled too.
This seems to reduce the hangs from https://bugs.freedesktop.org/show_bug.cgi?id=109242 on a RX 550 to the point where I can't reproduce, after the false start with the wd_switch_on_eop patch due to flakiness.
(but people are reporting it does not fix the issue completely for them on polaris 11)