radv: Fix hang with primitive restart on polaris11/12.
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=109242
Reproduced the hang with my rx550 and this seems to fix it.
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=109242
Reproduced the hang with my rx550 and this seems to fix it.